Missing Addend Within 20
1.OA.8 — Determine the unknown whole number in an addition or subtraction equation with the unknown in any position
Build this worksheet below — all three levels and the answer key, ready to print.
Loading…
Or take one of our 7 ready-made worksheets — already built, nothing to set up.
What is on the three Missing Addend Within 20 worksheets
- Support
- draws a number bond beside every problem.
- On level
- The grade's own level, with no drawings.
- Challenge
- uses the harder cases, and drops the familiar layout.
Example problems from the on-level sheet
- 6 + ___ = 14
- 1 + ___ = 2
- 4 + ___ = 10
Every sheet is generated, so the numbers are different each time you make one.
Before this: 1.OA.7 — understand the meaning of the equal sign; determine whether equations are true or false.