Missing Addends – Sums of 11 – X Marks the Spot!

X marks the spot! The buried treasure has been found! Aye matey, and you can make your own treasures by memorizing all the missing addends on this page.

CCSS  1.OA.6

Please go to this page to see all the missing addends worksheets for sums of 11-15.

missing addends - sums of 11 - x marks the spot