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Three-Digit Subtraction Regrouping

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Three-Digit Subtraction Regrouping

Base-10 blocks illustration

🧮 Part 1: Subtraction with Regrouping

Remember: When you can't subtract, you need to regroup! Exchange 1 ten for 10 ones, or 1 hundred for 10 tens.

1. Solve: 542 - 187 = _______
2. Solve: 623 - 249 = _______
3. Solve: 405 - 178 = _______
4. Solve: 734 - 356 = _______

🤔 Part 2: Understanding Regrouping

5. Look at this subtraction: 521 - 163. Which places need regrouping?

Ones place

Tens place

Hundreds place

No regrouping needed

6. When we regroup in 425 - 187, what happens in the tens place?

2 becomes 1

2 becomes 3

2 stays the same

2 becomes 12

7. Explain in your own words why we need to regroup when solving 302 - 156:

✅ Part 3: Check Your Work

8. Solve 614 - 287 = _______, then check your answer by estimating:

My estimate: 600 - 300 = _______ (Is your answer reasonable? _______)

9. Word Problem: Sarah had $456 in her savings account. She spent $189 on a new bike. How much money does she have left?

Answer: Sarah has $_______ left.

10. Challenge: A school collected 825 cans for recycling. On Monday, they recycled 347 cans. On Tuesday, they recycled 156 more cans. How many cans are left to recycle?

Answer: _______ cans are left to recycle.

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