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Math ninjas can learn the secrets of the rectangle with this practice page about the area and perimeter of a rectangle.

On this third grade math worksheet, kids round to estimate the sum of two numbers, a useful strategy for checking the results of calculations.

Can your child use her addition and subtraction knowledge to put the numbers where they need to go?

Round 'Em Up! Kids learn how to round to the nearest ten and the nearest hundred on this third grade math worksheet.