Adding and subtracting large numbers can sometimes be difficult. Estimating is an easy way to figure out if your answer is close, or if you need to try again.

Match words to visuals in this helpful base ten worksheet!

Rounding numbers can be tricky. Teach your third graders the rhyme five or more up the score, four or less let it rest.

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

Rounding can take some practice. Give your student the opportunity to master the art of rounding. Use the chart to help him figure out the answers.

Your student will practice her rounding skills with this multiple choice worksheet. Once she's done, she'll be an expert at rounding up and down.

Turn words into numbers in this colorful math worksheet!

Identify the names of numbers in the tens of thousands in this colorful worksheet!