What has to be broken before it can be used? Find out the answer to this riddle and more in this fun riddle and math combination worksheet.

Do some subzero subtraction with this regrouping worksheet. Kids will regroup, or borrow, to do some tricky subtraction work.

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

Strengthen subtraction skills in just two minutes with this third-grade worksheet!