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1) Quick tutorial: borrow a ten 🔁
If the ones on top are smaller, regroup 1 ten into 10 ones.
3 tens becomes 2 tens
34
- 8
26
How it works:
You can't do 4 − 8.
Take 1 ten from 3 tens.
Now you have 2 tens and 14 ones.
14 − 8 = 6, and 2 tens stay 2.
2) Warm-up subtracting 🌙
Solve these regrouping problems.
3) Two-digit subtraction 🦊
Borrow when needed.
Answers: 2) 26, 35, 45, 56, 65 | 3) 34, 37, 34, 56, 26
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4) Subtract within 100 🌈
Solve each problem.
5) Use addition to check ✅
Solve the subtraction, then write the addition check.
- 64 − 28 = Check: + 28 = 64
- 72 − 37 = Check: + 37 = 72
- 80 − 46 = Check: + 46 = 80
6) Which answer makes sense? 🧠
Choose the correct answer.
53 − 17 = 26 or 36
71 − 25 = 46 or 56
62 − 38 = 24 or 34
40 − 16 = 14 or 24
Answers: 4) 48, 55, 45, 35, 22 | 5) 36; 36 + 28 = 64 — 35; 35 + 37 = 72 — 34; 34 + 46 = 80 | 6) 36, 46, 24, 24