Ray's New Primary Arithmetic · Lesson LXXXII · Unit 8: Money, weights and measures

82. Pounds and ounces

Goal: Your child knows that 16 ounces make a pound and 2,000 pounds make a ton.

⏱ About 15 minutes · 3 steps

Open it at the Internet Archive ↗

You'll need

  • A kitchen scale and some food packages
  • A slate, small whiteboard or paper and pencil

What's in the book

Avoirdupois weight, the everyday kind: 16 ounces make 1 pound; 100 pounds make 1 hundredweight; 2,000 pounds make 1 ton. Then problems about rice, sugar, hay and fish.

The lesson, step by step

  1. Weigh things

    Read the weights on food packages. Find one that weighs a pound, and one that weighs about 8 ounces.

  2. The table

    Read the table. The hundredweight is rarely used now; pounds and tons are.

  3. Book problems

    Do the problems: 2 pounds is 32 ounces, 64 ounces is 4 pounds.

Afterwards

Guess and then weigh things in the kitchen.

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