Mix It Up! Addition and Subtraction up to 20

This worksheet is a recipe for expertise in addition and subtraction facts! Learners will need to solve 20 problems by finding the missing number that would make each equation true. In half of the problems, the sum or difference is missing. In the other half of the problems, one of the first two numbers in the equation is missing. This worksheet includes addition and subtraction facts within 20. 

This worksheet is perfect for first and second graders working on their fluency and automaticity with addition and subtraction facts. As they solve these problems, learners can improve their accuracy and speed with these simple math facts. By the end, they may even better understand the relationship between addition and subtraction. 

Keep up the practice with Crafty Facts: Add and Subtract Within 20, Addition and Subtraction Fluency Within 20, and the Flash Facts series.