Math Practice 101
Homework Explained - Math Practice 101

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Grade 7 McGraw Hill Glencoe - Answer Keys
Chapter 5: Expressions; Lesson 3: Properties of Operations


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Extra Practice

Name the property shown by each statement.

  • Question 20 (request help)

    State whether the conjecture is true or false. If false, provide a counterexample.
         Subtraction of whole numbers is commutative.
    • False
    • True
  • Question 21 (request help)

    Use Math Tools The times for each leg of a relay for four runners are shown. Use mental math to find the total time for the relay team. Explain.
  •    

Simplify each expression. Justify each step.

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