What is the Missing Number? Review Numbers 1-20

These math flash cards feature numbers 1 through 20. Each side contains three numbers and a blank. Name the missing number and then check to see if the answer is correct on the next slide.

Directions

1. Click on the first slide below to enlarge.
2. Click on the slide or thumbnail at the bottom to advance to the next slide.

Additional articles

• Skip Count by 10s to 100 Math Flash Cards
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