Tens with Tens, Ones with Ones

23 + 45 = 60 + 8.

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

What children learn in Level 38

23 plus 45. Put the tens together, and the ones together.
Tens: 20 plus 40 is 60. Ones: 3 plus 5 is 8. Together: 60 plus 8 is 68!
Sometimes the ones make a new ten. 36 plus 27: tens make 50, ones make 13. 50 plus 13 is 63.
Your turn! Build 31 plus 24.
Tens with tens, ones with ones, then put them together.

Georgia's K-12 Mathematics Standards:

1.NR.5.1 — Use a variety of strategies to solve applicable, mathematical addition and subtraction problems with one- and two-digit whole numbers.