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Summer Work: Earnings, Costs, and Changes worksheet preview

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Summer Work: Earnings, Costs, and Changes

Practice signed multiplication through summer job earnings, fuel costs, and schedule changes, and justify negative-times-negative products.

Grade 7MathInteractive · Printable

Aligned to7.NS.A.2.a

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What’s included

  • Single worksheet
  • Auto-graded online
  • 1 Common Core standard
  • Printable answer key
  • 14 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 7
Subject
Math
Question types
Fill in the blank, Multiple choice, Circle the answer, Short answer

About this worksheet

What students practice

  • Students interpret signed products as changes in summer job earnings and costs.
  • Students use the distributive property to justify products of two negative numbers.
  • Students multiply signed whole numbers, decimals, and fractions.

How to use

Use after introducing signed multiplication. Have students label what each sign means in the job problems, then discuss the final justification.

Curriculum

Common Core standard covered

7.NS.A.2.a

Understand why multiplying signed numbers follows rules like (-1)(-1) = 1, and interpret products in context.

Preview

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Name Date

Summer Work: Earnings, Costs, and Changes

Use signed products to compare mowing and babysitting plans.

Earnings and Expenses

Money earned is positive; money spent is negative. Write signed changes, using a minus sign for negative results.

1.
Jordan mows 4 lawns. Fuel for each lawn changes the job account balance by −$3.

What is the total signed change from fuel costs?   dollars

2.
Ari earns $12 per hour babysitting and works 2.5 hours.

What is the signed change in Ari's job account from these earnings?   dollars

3.
Lena earns $11 per hour babysitting. She works 3 fewer hours than planned. Her signed change in hours is −3. What does (−3) × 11 = −33 mean?
  • A. She earns $33 less than planned.
  • B. She spends $33 on babysitting supplies.
  • C. She earns $33 for all her babysitting.
  • D. She earns $33 more than planned.

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