Subtract two-digit numbers within 100
Subtract the ones, then the tens. Regroup if the top ones digit is smaller.
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24 − 11 =
Answer: 13
35 − 34 =
Answer: 1
40 − 10 =
Answer: 30
Tip: Subtract the ones, then the tens. Regroup if the top ones digit is smaller.
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Up next
- Next in this topic Mentally add 10s to two-digit numbers Class 2
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- Need a warm-up? Add a two-digit and a one-digit number Class 1
Curriculum
Common Core: 2.NBT.B.5
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