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Grade 2 Math · World 3: Hundred Harbor · Level 29
Subtract Tens
76 − 30.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 29
- Let's take away tens. Here's 76: 7 tens and 6 ones.
- Take away 30. That's 3 tens. Tap 3 tens to take them away!
- 4 tens and 6 ones are left. That's 46!
- On a number line, hop back by tens: 76, 66, 56, 46.
- Taking away tens only changes the tens digit.
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.