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

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.

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

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

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

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

Practice addition with your second grader, a math worksheet, and a deck of playing cards.

Work on addition while finding sums of 100 using a deck of playing cards and this first grade math worksheet.

Here's one way to reinforce addition facts and basic math vocabulary. Your child can add up the numbers and fill in missing signs in these addition problems.

Is your child comfortable with adding double-digit numbers? If he's getting there here's a different take on addition problems!

Your young learner can have a blast experimenting with addition facts in the Math Lab!

Get more practice balancing addition and subtraction equations with this lower grades math worksheet!

Get even more fun practice balancing addition and subtraction equations with this lower grades math worksheet!

An adorable whale is here to help your child practice addition and learn about inequalities in this cheerful 2nd grade math worksheet.

Start your engines and rush toward the finish line in this engaging addition worksheet!

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

This addition puzzle is a great math challenge. Experiment with the number combinations to find the requested sums.

Your child will use his addition and subtraction skills in this Christmas word problems worksheet. Do some math at Christmas with this festive worksheet.