Math Practice 101
Homework Explained - Math Practice 101

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Grade 3 Go Math Practice - Answer Keys
Chapter 1: Lesson 4: Mental Math Strategies


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Lesson Check

  • Question 1 (request help)

    Sylvia spent 36¢ for a pencil and 55¢ for a notepad. Use mental math to find how much she spent in all.
    • 80¢
    • 81¢
    • 90¢
    • 91¢
  • Question 2 (request help)

    Will spent 24 minutes putting together a model plane. Then he spent 48 minutes painting the model. How long did Will spend working on the model plane?
    • 62 minutes
    • 68 minutes
    • 72 minutes
    • 81 minutes

Spiral Review

  • Question 3 (request help)

    What name describes this shape?
    • hexagon
    • pentagon
    • quadrilateral
    • triangle
  • Question 4 (request help)

    What word describes the equal shares of the shape?
    • fourths
    • halves
    • sixths
    • thirds
  • Question 5 (request help)

    Tammy wrote an addition problem that has an odd sum. Which could be Tammy’s addition problem?
    • 2 + 6
    • 3 + 5
    • 5 + 6
    • 7 + 7
  • Question 6 (request help)

    Greg counted 83 cars and 38 trucks in the mall parking lot. Which is the best estimate of the total number of cars and trucks Greg counted?
    • 100
    • 110
    • 120
    • 130

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