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School Store: Order Shortcuts worksheet preview

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School Store: Order Shortcuts

Practice strategic addition and subtraction of rational numbers through school store orders, refunds, and packing-time adjustments.

Grade 7MathInteractive · Printable

Aligned to7.NS.A.1.d

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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 use commutative and associative properties to simplify rational-number sums.
  • Students rewrite subtraction as addition of the opposite before regrouping.
  • Students apply rational-number strategies to order totals, refunds, and time adjustments.

How to use

Ask students to mark useful pairs before calculating. After independent practice, discuss why signed addends can be reordered but subtraction cannot be regrouped freely.

Curriculum

Common Core standard covered

7.NS.A.1.d

Use properties of operations as strategies to add and subtract rational numbers.

Preview

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Name Date

School Store: Order Shortcuts

Use properties of operations to simplify online-order calculations.

Choose Useful Groups

The school store processes online orders. Use opposites and convenient groups instead of always calculating from left to right.

1.
An order log shows the changes 18.65 + (−7.40) + (−18.65), in dollars. Which rewrite groups opposite numbers together?
  • A. 18.65 + [7.40 + (−18.65)]
  • B. [18.65 + 18.65] + (−7.40)
  • C. [18.65 + (−7.40)] + (−18.65)
  • D. [18.65 + (−18.65)] + (−7.40)
2.
Find the combined change from four order adjustments.

−6.75 + 2.80 + 6.75 − 4.80 =   dollars

3.
Which expression correctly rewrites 9.50 − (−2.25) − 4.50 as addition only?
  • A. 9.50 + (−2.25) + (−4.50)
  • B. −9.50 + 2.25 + (−4.50)
  • C. 9.50 + 2.25 + (−4.50)
  • D. 9.50 + 2.25 + 4.50

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