Part and Part Stories

Find the whole from two parts, and ways a number can be split.

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

What children learn in Level 33

6 girls and 4 boys were playing soccer. How many children were playing? Put the two groups together: 10 children!
3 dogs and 2 cats are at the park. How many pets? Start at 3 and count on: 4, 5. 5 pets!
Sometimes there's more than one answer! Ann has 7 crayons. Some are blue and some are red. It could be 4 blue and 3 red, or 5 blue and 2 red, or 1 blue and 6 red.
Your turn! Show one way: make 7 crayons as 4 blue and 3 red. Flip 4 counters to the first color.
Try it with a grown-up! Grab some socks. How many are striped, and how many are plain? How many socks in all?

Georgia's K-12 Mathematics Standards:

K.NR.5.2 — Represent addition and subtraction within 10 from a given authentic situation using a variety of representations and strategies.
K.NR.5.3 — Use a variety of strategies to solve addition and subtraction problems within 10.