Math Practice 101
Homework Explained - Math Practice 101

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Grade 5 HMH Go Math - Answer Keys
Chapter 3; Lesson 7: Estimate Decimal Sums and Differences


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Lesson Check

  • Question 1 (request help)

    Regina has two electronic files. One has a size of 3.15 MB and the other has a size of 4.89 MB. Which is the best estimate of the total size of the two electronic files?
    • 7 MB
    • 7.5 MB
    • 8 MB
    • 8.5 MB
  • Question 2 (request help)

    Madison is training for a marathon, which is 26.2 miles. She currently can run 18.5 miles in a day. About how many more miles in a day does she have to add to run the length of a marathon?
    • 8 miles
    • 7.5 miles
    • 6.5 miles
    • 6 miles

Spiral Review

  • Question 3 (request help)

    A machine prints 8 banners in 120 seconds.How many seconds does it take to print one banner?
    • 10 seconds
    • 12 seconds
    • 15 seconds
    • 18 seconds
  • Question 4 (request help)

    To which place value is the number rounded?

    5.319 to 5.3
    • ones
    • tenths
    • hundredths
    • thousandths
  • Question 5 (request help)

    The average distance from Mars to the sun is about one hundred forty-one million, six hundred twenty thousand miles. How do you write the number that shows this distance in standard form?
    • 141,620
    • 1,416,200
    • 14,162,000
    • 141,620,000
  • Question 6 (request help)

    Logan ate 1.438 pounds of grapes. His brother Ralph ate 1.44 pounds of grapes. Which brother ate more grapes?
    • Logan
    • Ralph
    • They ate the same amount of grapes.
    • There is not enough information to decide which brother ate more grap

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