Break a Ten to Subtract

Subtract when there aren't enough ones: 62 − 28.

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

What children learn in Level 31

Here's 62 minus 28. We need to take away 8 ones, but there are only 2 ones!
Break a ten into 10 ones. Tap a ten!
Now there are 5 tens and 12 ones. It's still 62! Now take away 2 tens and 8 ones.
3 tens and 4 ones are left. 62 minus 28 is 34!
Your turn: 53 minus 17. Break a ten, then take away 1 ten and 7 ones.
53 minus 17 is 36. When there aren't enough ones, break a ten!

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.