Ray's New Practical Arithmetic · Art. 31 (49–67) · Unit 4: Multiplication

17. Multiplication story problems

Goal: Your child chooses multiplication for story problems about prices and quantities, sometimes with two steps.

⏱ About 35 minutes · 7 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

Nineteen story problems on flour, pork, sugar, sailing and buying and selling, with printed answers.

The lesson, step by step

  1. Warm-up

    Mental: 6 barrels at $5 each? 12 eggs at 3 cents each? 7 days at 8 hours a day?

  2. Price times quantity

    Read:

    What will 126 barrels of flour cost, at $6 a barrel?

    SayEach barrel costs $6, and there are 126 of them, so multiply. 126 × 6 = $756.

  3. Two steps

    Read:

    A grocer bought 2 barrels of sugar, each weighing 215 pounds, for 8 cents a pound: how much did he pay for the sugar?

    First find the pounds (2 × 215 = 430), then the cost (430 × 8 = 3440 cents).

  4. Guided practice

    Do problem 50 together:

    What will 823 barrels of pork cost, at $12 a barrel?

    (Answer $9876.)

  5. Independent practice

    Your child does problems 51 to about 62.

  6. Check

    Answers are printed. For two-step problems, check each step separately.

  7. Wrap-up

    Mental story: A book costs $2. What do 15 books cost? (30 dollars.)

Tip

Old prices (flour at $6 a barrel) are part of the charm. Ask your child what the same things might cost now.

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