Adding large numbers can be tough, but rounding makes it easy. Use rounding to the nearest 100 to make complicated addition problems simple.

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

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.

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

Practice three-digit addition with regrouping in this set of 36 problems.

Use these cards to help students see the difference between adding three-digit numbers using the standard algorithm and expanded notation.

Children practice finding the sum of two three-digit whole numbers, with no regrouping, in this math worksheet.

This worksheet teaches you to use base 10 drawings to add two-digit numbers.

Practice addition within 10 using ten frames with the help of this addition strategies worksheet! 

Use these strategy cards to help students develop their compare and contrast skills, along with deepening their understanding of three-digit addition.

Use this glossary with the EL Support Lesson Plan: Comparing Strategies for Three-Digit Addition.

Kids solve addition problems with three-digit addends using regrouping on this third grade math worksheet.

Get even more practice performing three-digit addition using open number lines with this second-grade math worksheet!

Practice adding 3 to numbers within 10 with this first-grade addition worksheet!

Get more practice representing 10 using ten frames in this kindergarten addition worksheet!

Use these vocabulary cards with the EL Support Lesson Plan: Comparing Strategies for Three-Digit Addition.

With this worksheet, your second graders will be adding up two-digit and three-digit numbers with ease.

How are your students coming along in their three-digit addition skills? Use this spring math assessment to gauge your students' abilities to add within 1,000.

Practice three-digit addition using open number lines with this second-grade math worksheet!

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.

Introduce learners to ten frames with this inviting early addition worksheet!

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.

Get more practice performing three-digit addition using open number lines with this second-grade math worksheet!

Draw shapes to add on to make 10 in this sweet kindergarten math worksheet!

Use this visual model to practice adding 10 to two-digit numbers!

Help your child practice adding four-digit and three-digit numbers! This Easter-themed math worksheet is more interesting than your average printable.

Get even more practice making 9 using ten frames with this kindergarten addition worksheet!

Master addition with ten frames in this colorful 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.