Make a New Ten

Add when the ones make a new ten: 38 + 25.

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

What children learn in Level 25

Here's 38 plus 25. Let's put the blocks together.
That's 5 tens and 13 ones. Too many ones! Tap 10 ones to make a new ten.
Now it's 6 tens and 3 ones: 63! So 38 plus 25 is 63.
Without blocks: the tens make 50. The ones, 8 plus 5, make 13. Then 50 plus 13 is 63.
When the ones add up to 10 or more, they make a new ten. Watch for it!

Georgia's K-12 Mathematics Standards:

2.NR.2.4 — Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.