Math Practice 101
Homework Explained - Math Practice 101

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Grade 3 Go Math Practice - Answer Keys
Common Core


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Change Customary Units of Length

Essential Question How can you change feet to inches?

UNLOCK the Problem

You can use different units to name the same length.

Erin has a shelf that is 2 feet long. How many inches long is Erin’s shelf?

  • Question 1 (request help)

    One Way

    Draw a picture.

    Draw one box to show each foot. Below each foot, draw 12 small boxes to show the number of inches in 1 foot. Count the total number of small boxes.
  • There are 24 small boxes in all. 2 feet =     inches.
    So, Erin’s shelf is     inches long.
  • Question 2 (request help)

    Another Way

    Use a number line.

    Erin has a table that is 3 feet long. How many inches long is her table? Draw a number line and label it in feet.

    Draw a 12-inch jump for each foot. Add the lengths of the jumps to find the total number of inches.
  • 3 feet =     inches.
    So, Erin’s table is     inches long.

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