Math Practice 101
Homework Explained - Math Practice 101

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Grade 3 Go Math Practice - Answer Keys
Chapter 1: Lesson 9: Mental Math Strategies for Subtraction


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Mental Math Strategies for Subtraction

Use mental math to find the difference.
Draw or describe the strategy you use.

Problem Solving

  • Question 7 (request help)

    Ruby has 78 books. Thirty-one of the books are on shelves. The rest are still packed in boxes. How many of Ruby’s books are still in boxes?
  •    books
  • Question 8 (request help)

    Kyle has 130 pins in his collection. He has 76 of the pins displayed on his wall. The rest are in a drawer. How many of Kyle’s pins are in a drawer?
  •    pins

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