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Robot Build: Smarter Sums worksheet preview

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Robot Build: Smarter Sums

Students use operation properties to add and subtract rational numbers while planning and testing a school robotics club's robot.

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, Matching, 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 and identify additive inverses.
  • Students apply rational-number strategies to robot assembly and testing situations.

How to use

Use after introducing signed rational-number operations. Ask students to show a helpful regrouping beside each calculation, then discuss the final error analysis.

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

Robot Build: Smarter Sums

Use properties of operations to simplify signed calculations.

Choose Efficient Strategies

The school robotics club is building a robot. Practice strategies the team can use to check its calculations.

1.
Which rewrite uses only the associative property of addition?
  • A. (−6 + 2.5) + 3.5 = −6 + (2.5 + 3.5)
  • B. −6 + 6 = 0
  • C. −6 + 2.5 = 2.5 + (−6)
  • D. −6 − 2.5 = −6 + (−2.5)
2.
Pair additive inverses before calculating.

−3.6 + 1.4 + 3.6 =  

3.
Which sum correctly rewrites −1/2 − (−3/4) − 1/4?
  • A. −1/2 + 3/4 + 1/4
  • B. 1/2 + 3/4 + (−1/4)
  • C. −1/2 + (−3/4) + (−1/4)
  • D. −1/2 + 3/4 + (−1/4)

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