These equations have lost their signs! Only one sign — plus or minus — can make each equation true.

Two-digit addition troubling your second grader? The only way to get the concept down is practice, practice ... and more practice!

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

Use a visual model to solve these two-digit addition problems!

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

Don’t let two-digit addition intimidate you; instead, use compensation to make friendly tens!

Groups of ten make addition a breeze! Use this nifty worksheet to learn about the "circle ten" shortcut.

Your second grader will use his addition with carrying skills to determine Maxine's tulip's growth per week.

Use your knowledge of place value to solve addition problems with this first- and second-grade worksheet!

Use this glossary with the EL Math Support Lesson: Multiples of 10.

Use this glossary with the EL Support Lesson Plan: Adding Within 20.

Use addition and subtraction to find the correct path through the puzzle.

Use these vocabulary cards with the EL Support Lesson Plan: What Are Arrays?

Use these vocabulary cards with the EL Math Support Lesson: Multiples of 10.

Learn how to use doubles facts to solve other addition problems!

Children use their addition skills to decode a puzzle in this fun math exercise.

Use these vocabulary cards with the EL Support Lesson Plan: Adding Within 20.

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

Use problem solving and critical thinking skills to find different sums in these puzzles.

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

Use math to construct a thriving city in this colorful worksheet for second graders!

Use this glossary with the EL Support Lesson Plan: Mental Math Bingo with Multiples of 10.

Use place value charts to solve word problems in this second-grade addition worksheet!

Use your addition skills to build your own number city in this unique worksheet!

Use this colorful, open-ended worksheet to help your learners understand the value of 100.

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

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

Use these vocabulary cards with the EL Support Lesson Plan: Mental Math Bingo with Multiples of 10.

Kids use two-digit addition to solve a handful of word problems.

Hop, skip, and jump using compensation in this second- and third-grade addition worksheet!