Three-digit addition practice worksheet with nine math problems on a bright green background.

Let’s solve each addition problem step by step. We’ll add the numbers column by column, starting from the right (ones place), then tens, then hundreds. If a column adds up to 10 or more, we carry over to the next column.

---

Problem 1:
```
214
5
+ 23
-----
```
Ones: 4 + 5 + 3 = 12 → write 2, carry 1
Tens: 1 + 0 + 2 + 1 (carry) = 4
Hundreds: 2 + 0 + 0 = 2
→ 242

---

Problem 2:
```
210
40
+ 22
-----
```
Ones: 0 + 0 + 2 = 2
Tens: 1 + 4 + 2 = 7
Hundreds: 2 + 0 + 0 = 2
→ 272

---

Problem 3:
```
782
12
+ 14
-----
```
Ones: 2 + 2 + 4 = 8
Tens: 8 + 1 + 1 = 10 → write 0, carry 1
Hundreds: 7 + 0 + 0 + 1 (carry) = 8
→ 808

---

Problem 4:
```
738
7
+ 165
-----
```
Ones: 8 + 7 + 5 = 20 → write 0, carry 2
Tens: 3 + 0 + 6 + 2 (carry) = 11 → write 1, carry 1
Hundreds: 7 + 0 + 1 + 1 (carry) = 9
→ 910

---

Problem 5:
```
414
13
+ 412
-----
```
Ones: 4 + 3 + 2 = 9
Tens: 1 + 1 + 1 = 3
Hundreds: 4 + 0 + 4 = 8
→ 839

---

Problem 6:
```
657
365
+ 22
-----
```
Ones: 7 + 5 + 2 = 14 → write 4, carry 1
Tens: 5 + 6 + 2 + 1 (carry) = 14 → write 4, carry 1
Hundreds: 6 + 3 + 0 + 1 (carry) = 10 → write 0, carry 1 → but no thousands? Wait — actually, 6+3=9, plus 1 carry = 10 → so it’s 1044? Let me check again:

Wait — 657 + 365 = 1022, then +22 = 1044. Yes.

But let’s do column-wise properly:

Ones: 7+5+2=14 → 4, carry 1
Tens: 5+6+2=13, plus 1 = 14 → 4, carry 1
Hundreds: 6+3+0=9, plus 1 = 10 → write 0, carry 1 → now we have a thousand: 1
→ 1044

---

Problem 7:
```
163
215
+ 19
-----
```
Ones: 3 + 5 + 9 = 17 → write 7, carry 1
Tens: 6 + 1 + 1 + 1 (carry) = 9
Hundreds: 1 + 2 + 0 = 3
→ 397

---

Problem 8:
```
374
22
+ 45
-----
```
Ones: 4 + 2 + 5 = 11 → write 1, carry 1
Tens: 7 + 2 + 4 + 1 (carry) = 14 → write 4, carry 1
Hundreds: 3 + 0 + 0 + 1 (carry) = 4
→ 441

---

Problem 9:
```
112
63
+ 320
-----
```
Ones: 2 + 3 + 0 = 5
Tens: 1 + 6 + 2 = 9
Hundreds: 1 + 0 + 3 = 4
→ 495

---

Problem 10:
```
22
95
+ 122
-----
```
Ones: 2 + 5 + 2 = 9
Tens: 2 + 9 + 2 = 13 → write 3, carry 1
Hundreds: 0 + 0 + 1 + 1 (carry) = 2
→ 239

---

Problem 11:
```
136
152
+ 91
-----
```
Ones: 6 + 2 + 1 = 9
Tens: 3 + 5 + 9 = 17 → write 7, carry 1
Hundreds: 1 + 1 + 0 + 1 (carry) = 3
→ 379

---

Problem 12:
```
471
122
+ 54
-----
```
Ones: 1 + 2 + 4 = 7
Tens: 7 + 2 + 5 = 14 → write 4, carry 1
Hundreds: 4 + 1 + 0 + 1 (carry) = 6
→ 647

---

Final Answer:
242, 272, 808, 910, 839, 1044, 397, 441, 495, 239, 379, 647