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!

There are plenty of fish in the sea! But only a few add together to make 12! This fun worksheet will help your child practice his simple addition.

Not only can your child practice her math facts with numbers between 1 and 20, she'll also practice writing addition problems with the correct symbols.

Not only does soup make you feel better, it can help you learn math too! Introduce your first grader to word problems by putting together some hearty soup.

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!

Give your kid practice deciding when to use addition and when to use subtraction with this word problem mix-up.

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 Support Lesson: Add Them Up!

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 these vocabulary cards with the EL Support Lesson: Fact Family Houses.

Use these vocabulary cards with the EL Support Lesson: Add Them Up!

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

Use ten frames to decipher doubles equations in this valuable addition worksheet!

Learn to use the commutative property with three-addend addition expressions!

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 these vocabulary cards with the EL Support Lesson Plan: Fact Family Triangles.