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

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

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

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

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

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.

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

Use place value to add three-digit numbers with this second-grade worksheet!

Bolster your third grader's addition skills with at-home practice in three-digit addition.

Add multi-digit numbers with ease in this colorful second-grade math worksheet!

Adding up big numbers can be tricky. Teach your budding mathematician a helpful trick to keep the numbers in line with carrying!

Children practice writing numbers from expanded forms, and expanded forms from numbers.

Let's see how those addition skills have blossomed over the course of the year! Use this quick math assessment to gauge your students' abilities to add three-digit numbers, both with and without regrouping.

Word problems make for great assessment tools because they require a complete understanding of the math concepts. Use this assessment to evaluate your students' abilities to add and subtract three-digit numbers using mixed operation word problems.

Can your second grader use her addition ability to chart the growth of Augusto's snapdragon?

Master addition using a place value chart with this engaging second-grade worksheet!

Your second grader and his handy addition skills are needed! Can he help Ralph keep track of his hollyhock's growth?

Once your child masters addition with carrying, there's practically no number too big for her to add!