Give students practice adding three-digit numbers within 1,000! 

Children will put their three-digit addition skills to the test as they solve 23 practice problems in this math worksheet.

Can your little math whiz add up sums quickly in his head? Teach him to estimate before adding, a great skill to put to use in everyday life!

Estimate the sum in each of these math problems. Challenge your child to round to the nearest hundred first, then add the two rounded numbers.

Add like mad with our thrilling addition worksheet! This three-minute math drill gets your child racing to complete all the addition equations on the page.

Practice place value, rounding and addition, all in one worksheet! Your child will learn to add up estimated sums quickly in his head.

Learners will solve 20 two- and three-digit addition problems in this versatile practice worksheet.

Use this resource to assess students’ abilities to solve a variety of word problems.

Children practice adding integers and decimals to the thousandths place in this practice worksheet.

Use this winter-themed resource with your students to practice multi-step word problems with mixed operations.

Use your addition and decoding skills to solve eight problems in this fun math puzzle!

Learners solve 12 three- and four-digit problems as they work on their multidigit addition skills.

Packed with addition problems requiring regrouping, this worksheet is a perfect way to practice addition with carrying.

What do sea monsters eat? Solve the math problems in this worksheet to reveal the answer! This math worksheets gets kids to build math and spelling skills.

Challenge your third grade mathematicians with these addition and subtraction word problems. This exercise is designed to assess your students' math level at the beginning of third grade.

This simple worksheet is packed with two-digit and three-digit subtraction problems.

How many shells did Sally sell by the seashore? Get your student in gear for math with this addition worksheet.

In this worksheet, children use number lines to practice adding and subtracting decimals to the tenths and hundredths place.

This resource gives your learners practice solving multi-step word problems with mixed operations. They will use addition, subtraction, or both operations.

Use this Arctic-themed resource with your students to practice multi-step word problems with mixed operations.

Math learners solve sports-themed addition and subtraction problems in this practice worksheet.

Improve those skills! Practice three-digit addition with these twelve problems.

Use this worksheet to continue practice with two addition strategies: expanded notation and standard algorithm. Students will be challenged to solve three-digit addition problems and then check their work using multiple methods.

Practice two-and three-digit subtraction in this set of school-themed word problems!

Use this worksheet to practice two strategies for solving three-digit addition problems. Students will flex their math muscles as they use both the expanded notation and standard algorithm strategies to solve challenging math problems.

These school-inspired math word problems will challenge your student!

Addition and subtraction practice can get a little repetitive, so mix it up with this funny under the sea worksheet.

Kids complete each equation on this third grade math worksheet by determining whether an equation is addition or subtraction and writing in the correct sign.

Why was 6 afraid of 7? 7 8 9 (seven ate nine)! Find more funny riddles to solve with this awesome addition worksheet.

Help your students apply strategies when solving addition problems. This worksheet provides practice for using number lines to solve addition problems with three-digit numbers.