Missing Number Addition to 20

Gain expertise with addition sentences within 20 in this helpful math worksheet! Each of these 16 equations prompts students to find the missing addend that makes the equation true. This worksheet includes one- and two-digit addends and sums within 20. 

Designed for first and second graders, this worksheet is a good resource for helping students build their automaticity and fluency with addition facts. These skills can support students as they learn more advanced addition skills, such as addition with multi-digit addends. 

The previous worksheet in this series is here: Missing Number Addition to 10. Keep up the addition practice with Addition to 20: Under the Sea and The Wheel of Math: Addition to 20.