Ray's New Higher Arithmetic: teaching guides on Teddy Rook Bookhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/Recent content in Ray's New Higher Arithmetic: teaching guides on Teddy Rook BookTeddy Rook Bookhttps://teddyrookbook.com/img/share.jpghttps://teddyrookbook.com/img/share.jpgHugoenSun, 11 Oct 2026 00:00:00 +0000Lesson 1: What arithmetic is abouthttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-1/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-1/Lesson 10: Business terms: accounts and balanceshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-10/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-10/Lesson 100: Life annuities, dowers and reversionshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-100/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-100/Lesson 101: Life insurancehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-101/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-101/Lesson 102: Partnership: shares for the same timehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-102/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-102/Lesson 103: Partnership: shares for different timeshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-103/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-103/Lesson 104: Bankruptcyhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-104/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-104/Lesson 105: Alligation medial: the average of a mixturehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-105/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-105/Lesson 106: Alligation alternate: how much of each?https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-106/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-106/Lesson 107: Alligation alternate: limited quantities and totalshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-107/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-107/Lesson 108: Powershttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-108/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-108/Lesson 109: Squaring and cubing a sumhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-109/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-109/Lesson 11: Multiplication: terms and the short multiplierhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-11/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-11/Lesson 110: Roots, and why the square root method workshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-110/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-110/Lesson 111: Extracting the square roothttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-111/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-111/Lesson 112: Extracting the cube roothttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-112/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-112/Lesson 113: Cube roots of products and fractions; any roothttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-113/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-113/Lesson 114: Horner's methodhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-114/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-114/Lesson 115: Triangles and the right trianglehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-115/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-115/Lesson 116: Similar figures and general exercises in rootshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-116/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-116/Lesson 117: Arithmetical progressionhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-117/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-117/Lesson 118: Geometrical progressionhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-118/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-118/Lesson 119: Lines, angles, surfaces and polygonshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-119/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-119/Lesson 12: Long multiplication and practical problemshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-12/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-12/Lesson 120: Areas of triangles and quadrilateralshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-120/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-120/Lesson 121: Regular polygons and the circlehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-121/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-121/Lesson 122: Solids: surfaces and volumeshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-122/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-122/Lesson 123: Masonry, brickwork and gauginghttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-123/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-123/Lesson 124: Lumber, grain and hayhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-124/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-124/Lesson 125: Miscellaneous exercises, part 1https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-125/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-125/Lesson 126: Miscellaneous exercises, part 2https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-126/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-126/Lesson 127: Miscellaneous exercises, part 3https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-127/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-127/Lesson 13: Bills, receipts and statementshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-13/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-13/Lesson 14: Short cuts: composite multipliers and ciphershttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-14/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-14/Lesson 15: More short cuts in multiplicationhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-15/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-15/Lesson 16: Division: terms and principleshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-16/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-16/Lesson 17: Long divisionhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-17/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-17/Lesson 18: Short divisionhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-18/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-18/Lesson 19: Short cuts in divisionhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-19/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-19/Lesson 2: Propositions, rules and numbershttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-2/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-2/Lesson 20: Arithmetical signs and the order of operationshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-20/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-20/Lesson 21: General principles of multiplication and divisionhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-21/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-21/Lesson 22: Short cuts with parts of 100https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-22/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-22/Lesson 23: General problems and miscellaneous exerciseshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-23/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-23/Lesson 24: Kinds of numbershttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-24/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-24/Lesson 25: Factoring and tests of divisibilityhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-25/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-25/Lesson 26: Common factors, all divisors and the greatest common divisorhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-26/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-26/Lesson 27: The least common multiplehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-27/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-27/Lesson 28: Casting out nineshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-28/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-28/Lesson 29: Cancellationhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-29/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-29/Lesson 3: The signs of arithmetichttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-3/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-3/Lesson 30: What a fraction ishttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-30/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-30/Lesson 31: Reading, writing and the principles of fractionshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-31/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-31/Lesson 32: Reduction of fractionshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-32/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-32/Lesson 33: Common denominatorshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-33/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-33/Lesson 34: Adding and subtracting fractionshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-34/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-34/Lesson 35: Multiplying fractionshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-35/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-35/Lesson 36: Dividing fractions and complex fractionshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-36/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-36/Lesson 37: G. C. D. and L. C. M. of fractionshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-37/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-37/Lesson 38: Promiscuous exercises in fractionshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-38/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-38/Lesson 39: Decimal fractions: notationhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-39/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-39/Lesson 4: Orders and periodshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-4/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-4/Lesson 40: Changing decimals and common fractionshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-40/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-40/Lesson 41: Adding and subtracting decimalshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-41/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-41/Lesson 42: Multiplying decimalshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-42/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-42/Lesson 43: Dividing decimalshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-43/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-43/Lesson 44: Circulating decimals: what they arehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-44/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-44/Lesson 45: Working with circulateshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-45/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-45/Lesson 46: Measures, value and United States moneyhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-46/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-46/Lesson 47: English, French and German moneyhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-47/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-47/Lesson 48: Measures of weighthttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-48/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-48/Lesson 49: Measures of length and surfacehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-49/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-49/Lesson 5: Reading and writing large numbershttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-5/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-5/Lesson 50: Solids, capacity and angleshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-50/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-50/Lesson 51: Time, longitude and other tableshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-51/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-51/Lesson 52: The metric systemhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-52/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-52/Lesson 53: Reduction of compound numbershttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-53/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-53/Lesson 54: Reduction practicehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-54/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-54/Lesson 55: Adding and subtracting compound numbershttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-55/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-55/Lesson 56: Multiplying and dividing compound numbershttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-56/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-56/Lesson 57: Longitude and timehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-57/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-57/Lesson 58: Aliquot partshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-58/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-58/Lesson 59: Ratiohttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-59/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-59/Lesson 6: The English method and Roman notationhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-6/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-6/Lesson 60: Proportion and the rule of threehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-60/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-60/Lesson 61: Simple proportion: practicehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-61/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-61/Lesson 62: Compound proportionhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-62/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-62/Lesson 63: Percentage: base, rate and percentagehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-63/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-63/Lesson 64: Finding the basehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-64/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-64/Lesson 65: Profit and loss: finding profit and ratehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-65/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-65/Lesson 66: Profit and loss: finding the costhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-66/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-66/Lesson 67: Stocks and bondshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-67/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-67/Lesson 68: Premium and discount: words and Case Ihttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-68/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-68/Lesson 69: Premium and discount: Cases II to IVhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-69/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-69/Lesson 7: Addition: definition and principleshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-7/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-7/Lesson 70: Commission and brokerage: words, Cases I and IIhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-70/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-70/Lesson 71: Commission: Cases III and IVhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-71/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-71/Lesson 72: Stock investments: words and Case Ihttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-72/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-72/Lesson 73: Stock investments: Cases II to Vhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-73/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-73/Lesson 74: Insurancehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-74/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-74/Lesson 75: Taxeshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-75/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-75/Lesson 76: United States revenue and customs dutieshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-76/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-76/Lesson 77: Interest: the wordshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-77/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-77/Lesson 78: Finding interest: the common method and aliquot partshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-78/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-78/Lesson 79: The six per cent method and exact interesthttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-79/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-79/Lesson 8: Adding: the rule, proofs and problemshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-8/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-8/Lesson 80: Finding the time and the ratehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-80/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-80/Lesson 81: Finding the principalhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-81/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-81/Lesson 82: Promissory noteshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-82/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-82/Lesson 83: Annual interesthttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-83/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-83/Lesson 84: Partial payments: the United States rulehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-84/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-84/Lesson 85: Connecticut, Vermont and mercantile ruleshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-85/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-85/Lesson 86: True discount and present worthhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-86/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-86/Lesson 87: Banks, checks and draftshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-87/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-87/Lesson 88: Bank discount and proceedshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-88/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-88/Lesson 89: Bank discount: face of a note, and rates of interesthttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-89/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-89/Lesson 9: Subtractionhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-9/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-9/Lesson 90: Exchange and domestic exchangehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-90/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-90/Lesson 91: Foreign exchangehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-91/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-91/Lesson 92: Arbitration of exchangehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-92/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-92/Lesson 93: Equation of paymentshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-93/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-93/Lesson 94: Settlement of accountshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-94/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-94/Lesson 95: Account sales and storage accountshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-95/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-95/Lesson 96: Compound interesthttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-96/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-96/Lesson 97: Compound interest by tables, and Cases II to IVhttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-97/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-97/Lesson 98: Annuities and perpetuitieshttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-98/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-98/Lesson 99: Annuities certain: present value, final value, payment, time and ratehttps://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-99/Sun, 11 Oct 2026 00:00:00 +0000https://teddyrookbook.com/homeschool/rays-arithmetic/higher/lesson-99/