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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Chapter 11 Extra Practice

Lessons 11.1, 11.3

  • Question 1 (request help)

    Find the perimeter of the shape. Each unit is 1 centimeter.
  •    centimeters
  • Question 2 (request help)

    The square has a perimeter of 28 inches. What is the length of each side of the square?
  •    inches

Lesson 11.2

Use a centimeter ruler to find the perimeter.

Lessons 11.4–11.6

Find the area of the shape.
Each unit square is 1 square inch.

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