Finding each missing addend in these 15 problems can be as fun as searching for seashells on the seashore – only you won’t get all sandy!
CCSS 1.OA.6
Please go to this page to see all the missing addend worksheets for sums of 16-20.
![missing addend - sums of 18 - seashell](https://www.awellspringofworksheets.com/wp-content/uploads/2016/03/missing-addend-sums-of-18-seashell_premium-231x300.jpg)
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Finding each missing addend in these 15 problems can be as fun as searching for seashells on the seashore – only you won’t get all sandy!
CCSS 1.OA.6
Please go to this page to see all the missing addend worksheets for sums of 16-20.
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