This set of 24 task cards is great practice when learning about or reviewing basic addition sentences within 20. The students will choose a card. They will see that there is one addend that is missing from the problem. They will work to determine what the missing number is and place the circle number that completes the addition sentence on top of the seashell. They can then record their answers on the recording sheet.
If you are looking for other 1st grade math centers, please check out the links below!
Addition within 20 Puzzles
Find the Missing Number-Addition Edition
Subtracting within 20 Puzzles
Place Value Matching
Telling Time Puzzles
Comparing Number Puzzles
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1st Grade Math Centers Bundle
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