Addition and Subtraction with Regrouping Worksheets with Answer Key - Free Printable

Problem: Solve the addition and subtraction problems with regrouping.

The worksheet contains 20 problems, divided into addition and subtraction. We will solve each problem step by step, showing the process of regrouping where necessary.

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#### Problem 1: \( 808 - 272 \)
```
808
- 272
------
```
1. Subtract the ones place: \( 8 - 2 = 6 \).
2. Subtract the tens place: \( 0 - 7 \). Since 0 is less than 7, borrow 1 from the hundreds place (8 becomes 7, and 0 becomes 10).
- \( 10 - 7 = 3 \).
3. Subtract the hundreds place: \( 7 - 2 = 5 \).

Answer: \( 536 \)

---

#### Problem 2: \( 614 - 336 \)
```
614
- 336
------
```
1. Subtract the ones place: \( 4 - 6 \). Since 4 is less than 6, borrow 1 from the tens place (1 becomes 0, and 4 becomes 14).
- \( 14 - 6 = 8 \).
2. Subtract the tens place: \( 0 - 3 \). Since 0 is less than 3, borrow 1 from the hundreds place (6 becomes 5, and 0 becomes 10).
- \( 10 - 3 = 7 \).
3. Subtract the hundreds place: \( 5 - 3 = 2 \).

Answer: \( 278 \)

---

#### Problem 3: \( 562 + 362 \)
```
562
+ 362
------
```
1. Add the ones place: \( 2 + 2 = 4 \).
2. Add the tens place: \( 6 + 6 = 12 \). Write down 2 and carry over 1.
3. Add the hundreds place: \( 5 + 3 + 1 = 9 \).

Answer: \( 924 \)

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#### Problem 4: \( 873 - 597 \)
```
873
- 597
------
```
1. Subtract the ones place: \( 3 - 7 \). Since 3 is less than 7, borrow 1 from the tens place (7 becomes 6, and 3 becomes 13).
- \( 13 - 7 = 6 \).
2. Subtract the tens place: \( 6 - 9 \). Since 6 is less than 9, borrow 1 from the hundreds place (8 becomes 7, and 6 becomes 16).
- \( 16 - 9 = 7 \).
3. Subtract the hundreds place: \( 7 - 5 = 2 \).

Answer: \( 276 \)

---

#### Problem 5: \( 608 - 272 \)
```
608
- 272
------
```
1. Subtract the ones place: \( 8 - 2 = 6 \).
2. Subtract the tens place: \( 0 - 7 \). Since 0 is less than 7, borrow 1 from the hundreds place (6 becomes 5, and 0 becomes 10).
- \( 10 - 7 = 3 \).
3. Subtract the hundreds place: \( 5 - 2 = 3 \).

Answer: \( 336 \)

---

#### Problem 6: \( 344 - 198 \)
```
344
- 198
------
```
1. Subtract the ones place: \( 4 - 8 \). Since 4 is less than 8, borrow 1 from the tens place (4 becomes 3, and 4 becomes 14).
- \( 14 - 8 = 6 \).
2. Subtract the tens place: \( 3 - 9 \). Since 3 is less than 9, borrow 1 from the hundreds place (3 becomes 2, and 3 becomes 13).
- \( 13 - 9 = 4 \).
3. Subtract the hundreds place: \( 2 - 1 = 1 \).

Answer: \( 146 \)

---

#### Problem 7: \( 622 + 219 \)
```
622
+ 219
------
```
1. Add the ones place: \( 2 + 9 = 11 \). Write down 1 and carry over 1.
2. Add the tens place: \( 2 + 1 + 1 = 4 \).
3. Add the hundreds place: \( 6 + 2 = 8 \).

Answer: \( 841 \)

---

#### Problem 8: \( 687 - 492 \)
```
687
- 492
------
```
1. Subtract the ones place: \( 7 - 2 = 5 \).
2. Subtract the tens place: \( 8 - 9 \). Since 8 is less than 9, borrow 1 from the hundreds place (6 becomes 5, and 8 becomes 18).
- \( 18 - 9 = 9 \).
3. Subtract the hundreds place: \( 5 - 4 = 1 \).

Answer: \( 195 \)

---

#### Problem 9: \( 778 + 992 \)
```
778
+ 992
------
```
1. Add the ones place: \( 8 + 2 = 10 \). Write down 0 and carry over 1.
2. Add the tens place: \( 7 + 9 + 1 = 17 \). Write down 7 and carry over 1.
3. Add the hundreds place: \( 7 + 9 + 1 = 17 \). Write down 7 and carry over 1.
4. Add the thousands place: \( 0 + 1 = 1 \).

Answer: \( 1770 \)

---

#### Problem 10: \( 822 + 298 \)
```
822
+ 298
------
```
1. Add the ones place: \( 2 + 8 = 10 \). Write down 0 and carry over 1.
2. Add the tens place: \( 2 + 9 + 1 = 12 \). Write down 2 and carry over 1.
3. Add the hundreds place: \( 8 + 2 + 1 = 11 \). Write down 1 and carry over 1.
4. Add the thousands place: \( 0 + 1 = 1 \).

Answer: \( 1120 \)

---

#### Problem 11: \( 909 + 707 \)
```
909
+ 707
------
```
1. Add the ones place: \( 9 + 7 = 16 \). Write down 6 and carry over 1.
2. Add the tens place: \( 0 + 0 + 1 = 1 \).
3. Add the hundreds place: \( 9 + 7 = 16 \). Write down 6 and carry over 1.
4. Add the thousands place: \( 0 + 1 = 1 \).

Answer: \( 1616 \)

---

#### Problem 12: \( 444 - 298 \)
```
444
- 298
------
```
1. Subtract the ones place: \( 4 - 8 \). Since 4 is less than 8, borrow 1 from the tens place (4 becomes 3, and 4 becomes 14).
- \( 14 - 8 = 6 \).
2. Subtract the tens place: \( 3 - 9 \). Since 3 is less than 9, borrow 1 from the hundreds place (4 becomes 3, and 3 becomes 13).
- \( 13 - 9 = 4 \).
3. Subtract the hundreds place: \( 3 - 2 = 1 \).

Answer: \( 146 \)

---

#### Problem 13: \( 564 - 368 \)
```
564
- 368
------
```
1. Subtract the ones place: \( 4 - 8 \). Since 4 is less than 8, borrow 1 from the tens place (6 becomes 5, and 4 becomes 14).
- \( 14 - 8 = 6 \).
2. Subtract the tens place: \( 5 - 6 \). Since 5 is less than 6, borrow 1 from the hundreds place (5 becomes 4, and 5 becomes 15).
- \( 15 - 6 = 9 \).
3. Subtract the hundreds place: \( 4 - 3 = 1 \).

Answer: \( 196 \)

---

#### Problem 14: \( 559 + 124 \)
```
559
+ 124
------
```
1. Add the ones place: \( 9 + 4 = 13 \). Write down 3 and carry over 1.
2. Add the tens place: \( 5 + 2 + 1 = 8 \).
3. Add the hundreds place: \( 5 + 1 = 6 \).

Answer: \( 683 \)

---

#### Problem 15: \( 728 + 249 \)
```
728
+ 249
------
```
1. Add the ones place: \( 8 + 9 = 17 \). Write down 7 and carry over 1.
2. Add the tens place: \( 2 + 4 + 1 = 7 \).
3. Add the hundreds place: \( 7 + 2 = 9 \).

Answer: \( 977 \)

---

#### Problem 16: \( 272 + 299 \)
```
272
+ 299
------
```
1. Add the ones place: \( 2 + 9 = 11 \). Write down 1 and carry over 1.
2. Add the tens place: \( 7 + 9 + 1 = 17 \). Write down 7 and carry over 1.
3. Add the hundreds place: \( 2 + 2 + 1 = 5 \).

Answer: \( 571 \)

---

#### Problem 17: \( 844 + 129 \)
```
844
+ 129
------
```
1. Add the ones place: \( 4 + 9 = 13 \). Write down 3 and carry over 1.
2. Add the tens place: \( 4 + 2 + 1 = 7 \).
3. Add the hundreds place: \( 8 + 1 = 9 \).

Answer: \( 973 \)

---

#### Problem 18: \( 901 - 707 \)
```
901
- 707
------
```
1. Subtract the ones place: \( 1 - 7 \). Since 1 is less than 7, borrow 1 from the tens place (0 becomes 9, and 1 becomes 11).
- \( 11 - 7 = 4 \).
2. Subtract the tens place: \( 9 - 0 = 9 \).
3. Subtract the hundreds place: \( 8 - 7 = 1 \).

Answer: \( 194 \)

---

#### Problem 19: \( 722 + 638 \)
```
722
+ 638
------
```
1. Add the ones place: \( 2 + 8 = 10 \). Write down 0 and carry over 1.
2. Add the tens place: \( 2 + 3 + 1 = 6 \).
3. Add the hundreds place: \( 7 + 6 = 13 \). Write down 3 and carry over 1.
4. Add the thousands place: \( 0 + 1 = 1 \).

Answer: \( 1360 \)

---

#### Problem 20: \( 700 - 346 \)
```
700
- 346
------
```
1. Subtract the ones place: \( 0 - 6 \). Since 0 is less than 6, borrow 1 from the tens place (0 becomes 9, and 0 becomes 10).
- \( 10 - 6 = 4 \).
2. Subtract the tens place: \( 9 - 4 = 5 \).
3. Subtract the hundreds place: \( 6 - 3 = 3 \).

Answer: \( 354 \)

---

Final Answers:

\[
\boxed{
\begin{array}{ll}
1. & 536 \\
2. & 278 \\
3. & 924 \\
4. & 276 \\
5. & 336 \\
6. & 146 \\
7. & 841 \\
8. & 195 \\
9. & 1770 \\
10. & 1120 \\
11. & 1616 \\
12. & 146 \\
13. & 196 \\
14. & 683 \\
15. & 977 \\
16. & 571 \\
17. & 973 \\
18. & 194 \\
19. & 1360 \\
20. & 354 \\
\end{array}
}
\]