3rd Grade Math
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Place Value
Addition
Subtraction
Multiplication
Division
Fractions
Shapes
Time
Perimeter
Area
Liquid, Volume, and Mass
Data
Videos
Understanding Perimeter
Using Perimeter to Solve Real World Problems
Perimeter of Common Shapes
Problem Solving: Try, Check, and Revise
Extra Practice
Calculating Perimeter
Perimeter Shape Shoot
Printables
Find the perimeter of polygons on grid paper
Find the perimeter