Math Practice 101
Homework Explained - Math Practice 101

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Grade 3 Go Math Practice - Answer Keys
Chapter 1: Lesson 8: Estimate Differences


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Estimate Differences

Use rounding or compatible numbers to estimate the difference.

  • Question 1 (request help)

       40                       40
    -  13                     - 10
                 Estimate:   30
  • Question 5 (request help)

       287
    -  162   

    Estimate:
  •    -
    		   =
    		   
  • Question 6 (request help)

       359
    -  224   

    Estimate:
  •    -
    		   =
    		   
  • Question 7 (request help)

       68
    -  31   

    Estimate:
  •    -
    		   =
    		   
  • Question 8 (request help)

       476
    -  155   

    Estimate:
  •    -
    		   =
    		   
  • Question 9 (request help)

       622
    -  307   

    Estimate:
  •    -
    		   =
    		   

Problem Solving

  • Question 12 (request help)

    Ben has a collection of 812 stamps. He gives his brother 345 stamps. About how many stamps does Ben have left?
  • About   stamps
  • Question 13 (request help)

    Danika is making necklaces. She has 512 silver beads and 278 blue beads. About how many more silver than blue beads does Danika have?
  • About    more silver than blue beads

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