Missing Addend – Sums of 18 – Sea Green Sea Star

Be a shining star! Put all your effort into finding the missing addend in each of these 12 missing addend problems. They all have the same sum – 18.

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 - sea green sea star