Practice addition with these 18 multi-digit math problems.

Let's solve each of the addition problems step by step. I'll go through each one and provide the correct sum.

---

1.

```
4372
+ 2125
------
```
Add column by column from right to left:
- Units: 2 + 5 = 7
- Tens: 7 + 2 = 9
- Hundreds: 3 + 1 = 4
- Thousands: 4 + 2 = 6

✔ 6497

---

2.

```
5376
+ 2423
------
```
- Units: 6 + 3 = 9
- Tens: 7 + 2 = 9
- Hundreds: 3 + 4 = 7
- Thousands: 5 + 2 = 7

✔ 7799

---

3.

```
34246
+ 3523
-------
```
Align numbers:
```
34246
+ 3523
-------
```
- Units: 6 + 3 = 9
- Tens: 4 + 2 = 6
- Hundreds: 2 + 5 = 7
- Thousands: 4 + 3 = 7
- Ten thousands: 3 + 0 = 3

✔ 37769

---

4.

```
3275
+ 2966
------
```
- Units: 5 + 6 = 11 → write 1, carry 1
- Tens: 7 + 6 = 13 + 1 = 14 → write 4, carry 1
- Hundreds: 2 + 9 = 11 + 1 = 12 → write 2, carry 1
- Thousands: 3 + 2 = 5 + 1 = 6

✔ 6241

---

5.

```
24684
+ 4738
-------
```
Align:
```
24684
+ 4738
-------
```
- Units: 4 + 8 = 12 → write 2, carry 1
- Tens: 8 + 3 = 11 + 1 = 12 → write 2, carry 1
- Hundreds: 6 + 7 = 13 + 1 = 14 → write 4, carry 1
- Thousands: 4 + 4 = 8 + 1 = 9
- Ten thousands: 2 + 0 = 2

✔ 29422

---

6.

```
42385
+ 3446
-------
```
- Units: 5 + 6 = 11 → write 1, carry 1
- Tens: 8 + 4 = 12 + 1 = 13 → write 3, carry 1
- Hundreds: 3 + 4 = 7 + 1 = 8
- Thousands: 2 + 3 = 5
- Ten thousands: 4 + 0 = 4

✔ 45831

---

7.

```
533348
+ 366992
--------
```
- Units: 8 + 2 = 10 → write 0, carry 1
- Tens: 4 + 9 = 13 + 1 = 14 → write 4, carry 1
- Hundreds: 3 + 9 = 12 + 1 = 13 → write 3, carry 1
- Thousands: 3 + 6 = 9 + 1 = 10 → write 0, carry 1
- Ten thousands: 3 + 6 = 9 + 1 = 10 → write 0, carry 1
- Hundred thousands: 5 + 3 = 8 + 1 = 9

✔ 899340

---

8.

```
567612
+ 29359
--------
```
Align:
```
567612
+ 29359
--------
```
- Units: 2 + 9 = 11 → write 1, carry 1
- Tens: 1 + 5 = 6 + 1 = 7
- Hundreds: 6 + 3 = 9
- Thousands: 7 + 9 = 16 → write 6, carry 1
- Ten thousands: 6 + 2 = 8 + 1 = 9
- Hundred thousands: 5 + 0 = 5

✔ 596971

---

9.

```
4833
+ 54392
-------
```
Align:
```
4833
+ 54392
-------
```
- Units: 3 + 2 = 5
- Tens: 3 + 9 = 12 → write 2, carry 1
- Hundreds: 8 + 3 = 11 + 1 = 12 → write 2, carry 1
- Thousands: 4 + 4 = 8 + 1 = 9
- Ten thousands: 0 + 5 = 5

✔ 59225

---

10.

```
37659
+ 82145
-------
```
- Units: 9 + 5 = 14 → write 4, carry 1
- Tens: 5 + 4 = 9 + 1 = 10 → write 0, carry 1
- Hundreds: 6 + 1 = 7 + 1 = 8
- Thousands: 7 + 2 = 9
- Ten thousands: 3 + 8 = 11 → write 1, carry 1 (extra digit)

✔ 119804

---

11.

```
53621
+ 56321
-------
```
- Units: 1 + 1 = 2
- Tens: 2 + 2 = 4
- Hundreds: 6 + 3 = 9
- Thousands: 3 + 6 = 9
- Ten thousands: 5 + 5 = 10 → write 0, carry 1

✔ 109942

---

12.

```
5910
+ 62147
-------
```
Align:
```
5910
+ 62147
-------
```
- Units: 0 + 7 = 7
- Tens: 1 + 4 = 5
- Hundreds: 9 + 1 = 10 → write 0, carry 1
- Thousands: 5 + 2 = 7 + 1 = 8
- Ten thousands: 0 + 6 = 6

✔ 68057

---

13.

```
7553
23416
+ 4273
-------
```
Add all three numbers:
First add 7553 + 23416 = ?

```
7553
+23416
------
30969
```

Now add 30969 + 4273:

```
30969
+ 4273
------
35242
```

✔ 35242

---

14.

```
357
7832
+19496
-------
```
Add step by step:
First: 357 + 7832 = ?

```
357
+7832
-----
8189
```

Then: 8189 + 19496 =

```
8189
+19496
-------
27685
```

✔ 27685

---

15.

```
621239
155632
+119215
--------
```
Step 1: 621239 + 155632

```
621239
+155632
--------
776871
```

Step 2: 776871 + 119215

```
776871
+119215
--------
896086
```

✔ 896086

---

16.

```
532175
1234563
+ 47217
---------
```
Align:
```
532175
1234563
+ 47217
---------
```
Add first two: 532175 + 1234563

```
532175
+1234563
--------
1766738
```

Now add 1766738 + 47217:

```
1766738
+ 47217
--------
1813955
```

✔ 1813955

---

17.

```
721375
33315
+1298345
--------
```
Add step by step:

First: 721375 + 33315 = ?

```
721375
+ 33315
-------
754690
```

Now: 754690 + 1298345

```
754690
+1298345
--------
2053035
```

✔ 2053035

---

18.

```
98765
43210
+ 86421
-------
```
Add:

First: 98765 + 43210 = ?

```
98765
+43210
-------
141975
```

Now: 141975 + 86421

```
141975
+ 86421
-------
228396
```

✔ 228396

---

✔ Final Answers:

| Problem | Answer |
|--------|------------|
| 1 | 6497 |
| 2 | 7799 |
| 3 | 37769 |
| 4 | 6241 |
| 5 | 29422 |
| 6 | 45831 |
| 7 | 899340 |
| 8 | 596971 |
| 9 | 59225 |
| 10 | 119804 |
| 11 | 109942 |
| 12 | 68057 |
| 13 | 35242 |
| 14 | 27685 |
| 15 | 896086 |
| 16 | 1813955 |
| 17 | 2053035 |
| 18 | 228396 |

Let me know if you'd like a visual explanation or verification for any specific problem!