Story Problems: Adding To and Taking From

Solve change stories with the unknown anywhere.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 30

Story problems are math in real life. Read carefully, and picture what's happening. Then decide: are things being put together, or taken away?
Mia had 6 shells. Then Mia found 5 more. How many now? Things are added to the group: 6 plus 5 is 11.
Leo had 12 marbles and lost some. Now Leo has 9. How many were lost? The whole is 12, and 9 are left. Think: 9 plus what makes 12? 3 were lost.
Ava had some stickers. Then Ava got 4 more, and now has 10. How many at the start? Something plus 4 is 10. It was 6!
Don't just look for words like more or left. Picture the story, find the whole and the parts, then solve.

Georgia's K-12 Mathematics Standards:

1.NR.2.1 — Use a variety of strategies to solve addition and subtraction problems within 20.
1.NR.2.6 — Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers.