Addition Worksheets (3-Digit) - Free Printable

Problem: Solve the addition problems with regrouping.

The worksheet provides six addition problems, each requiring regrouping (carrying over) when necessary. Let's solve each problem step by step.

---

#### Problem 1:
```
hundreds tens ones
5 2 3
+ 1 2 8
-------------------
```

1. Ones place:
\( 3 + 8 = 11 \)
Write down 1 in the ones place and carry over 1 to the tens place.

2. Tens place:
\( 2 + 2 + 1 (\text{carry}) = 5 \)
Write down 5 in the tens place.

3. Hundreds place:
\( 5 + 1 = 6 \)
Write down 6 in the hundreds place.

Answer:
```
hundreds tens ones
6 5 1
```

---

#### Problem 2:
```
hundreds tens ones
4 6 5
+ 1 9 2
-------------------
```

1. Ones place:
\( 5 + 2 = 7 \)
Write down 7 in the ones place.

2. Tens place:
\( 6 + 9 = 15 \)
Write down 5 in the tens place and carry over 1 to the hundreds place.

3. Hundreds place:
\( 4 + 1 + 1 (\text{carry}) = 6 \)
Write down 6 in the hundreds place.

Answer:
```
hundreds tens ones
6 5 7
```

---

#### Problem 3:
```
hundreds tens ones
2 8 9
+ 2 0 4
-------------------
```

1. Ones place:
\( 9 + 4 = 13 \)
Write down 3 in the ones place and carry over 1 to the tens place.

2. Tens place:
\( 8 + 0 + 1 (\text{carry}) = 9 \)
Write down 9 in the tens place.

3. Hundreds place:
\( 2 + 2 = 4 \)
Write down 4 in the hundreds place.

Answer:
```
hundreds tens ones
4 9 3
```

---

#### Problem 4:
```
hundreds tens ones
3 4 3
+ 1 7 4
-------------------
```

1. Ones place:
\( 3 + 4 = 7 \)
Write down 7 in the ones place.

2. Tens place:
\( 4 + 7 = 11 \)
Write down 1 in the tens place and carry over 1 to the hundreds place.

3. Hundreds place:
\( 3 + 1 + 1 (\text{carry}) = 5 \)
Write down 5 in the hundreds place.

Answer:
```
hundreds tens ones
5 1 7
```

---

#### Problem 5:
```
hundreds tens ones
6 1 7
+ 2 8 9
-------------------
```

1. Ones place:
\( 7 + 9 = 16 \)
Write down 6 in the ones place and carry over 1 to the tens place.

2. Tens place:
\( 1 + 8 + 1 (\text{carry}) = 10 \)
Write down 0 in the tens place and carry over 1 to the hundreds place.

3. Hundreds place:
\( 6 + 2 + 1 (\text{carry}) = 9 \)
Write down 9 in the hundreds place.

Answer:
```
hundreds tens ones
9 0 6
```

---

#### Problem 6:
```
hundreds tens ones
5 9 2
+ 3 2 9
-------------------
```

1. Ones place:
\( 2 + 9 = 11 \)
Write down 1 in the ones place and carry over 1 to the tens place.

2. Tens place:
\( 9 + 2 + 1 (\text{carry}) = 12 \)
Write down 2 in the tens place and carry over 1 to the hundreds place.

3. Hundreds place:
\( 5 + 3 + 1 (\text{carry}) = 9 \)
Write down 9 in the hundreds place.

Answer:
```
hundreds tens ones
9 2 1
```

---

Final Answers:

1. 651
2. 657
3. 493
4. 517
5. 906
6. 921

Boxed Final Answer:
\[
\boxed{651, 657, 493, 517, 906, 921}
\]