Ray's New Practical Arithmetic · Art. 60 · Unit 6: United States Money

31. Money problems of every kind

Goal: Your child solves mixed money problems, choosing the operation and writing money correctly.

⏱ About 35 minutes · 6 steps

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You'll need

  • The book
  • A slate, small whiteboard or scrap paper
  • A notebook and pencil

What's in the book

Fifteen promiscuous (mixed) examples using all four rules with dollars and cents. Answers are printed.

The lesson, step by step

  1. Warm-up

    Mental: $2.50 + $3.75? $10 − $6.40? 4 × $1.20? $9 ÷ 6?

  2. Guided practice

    Do the first two together:

    1. I owe A $47.50; B, $38.45; C, $15.47; D, $19.43: what sum do I owe?

    2. A owes $35.25 ; B, $23.75 ; C, as much as A and B, and $1 more: what is the amount?

    (Answers $120.85 and $119.)

  3. Plan, then work

    SayFor each problem, write in words what you'll do first, then do it.

  4. Independent practice

    Your child does problems 3 to about 12.

  5. Check

    Answers are printed. Wrong answers are usually a misplaced decimal point; check that first.

  6. Wrap-up

    Your child plans a pretend shopping trip with three items and a $20 bill and works out the change.

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