Add-To, Change Unknown
1.OA.1 — Add and subtract within 20 to solve word problems involving add-to, take-from, put-together, take-apart, and compare situations, with unknowns in all positions
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What is on the three Add-To, Change Unknown worksheets
- Support
- draws a part-part-whole bar beside every problem.
- On level
- The grade's own level, with no drawings.
- Challenge
- moves the missing number out of the answer slot.
Example problems from the on-level sheet
- Luca started with 4 coins. Now Luca has 13. How many more did Rosa give Luca?
- Zoe had 9 grapes. Now Zoe has 19. How many more did Zoe get?
- There were 9 marbles on the table. Now there are 17. How many more did Amara put in?
Every sheet is generated, so the numbers are different each time you make one.
Before this: K.OA.2 — solve addition and subtraction word problems, and add and subtract within 10.