Large Numbers Addition Worksheet for Math Practice

Let’s solve each addition problem step by step. We’ll add the numbers carefully, column by column from right to left, carrying over when needed.

---

Problem 1:
```
3829814
+ 9730689
---------
```
Start from the right:
- 4 + 9 = 13 → write 3, carry 1
- 1 + 8 + 8 = 17 → write 7, carry 1
- 1 + 1 + 6 = 8
- 9 + 0 = 9
- 2 + 3 = 5
- 8 + 7 = 15 → write 5, carry 1
- 1 + 3 + 9 = 13 → write 13

→ 13,560,503

Wait — let me double-check with a better method:

Actually, let's do it properly:

```
3829814
+ 9730689
----------
```

Align:

Millions: 3 + 9 = 12
Hundred thousands: 8 + 7 = 15 → but we have to consider carries.

Better to do digit by digit from right:

Position (right to left):

1. Units: 4 + 9 = 13 → 3, carry 1
2. Tens: 1 + 8 + 8 = 17 → 7, carry 1
3. Hundreds: 1 + 1 + 6 = 8
4. Thousands: 9 + 0 = 9
5. Ten thousands: 2 + 3 = 5
6. Hundred thousands: 8 + 7 = 15 → 5, carry 1
7. Millions: 1 + 3 + 9 = 13 → 13

So: 13,560,503

✔ Correct.

---

Problem 2:
```
5743629
+ 1258187
---------
```

Right to left:

9 + 7 = 16 → 6, carry 1
2 + 8 + 1 = 11 → 1, carry 1
6 + 1 + 1 = 8
3 + 8 = 11 → 1, carry 1
4 + 5 + 1 = 10 → 0, carry 1
7 + 2 + 1 = 10 → 0, carry 1
5 + 1 + 1 = 7

→ 7,001,816

Check: 5,743,629 + 1,258,187 = ?

5,743,629
+1,258,187
= 7,001,816 ✔

---

Problem 3:
```
3748925
+ 8073253
---------
```

5 + 3 = 8
2 + 5 = 7
9 + 2 = 11 → 1, carry 1
8 + 3 + 1 = 12 → 2, carry 1
4 + 7 + 1 = 12 → 2, carry 1
7 + 0 + 1 = 8
3 + 8 = 11 → 11

→ 11,822,178

Check: 3,748,925 + 8,073,253 = 11,822,178 ✔

---

Problem 4:
```
7359621
+ 6547982
---------
```

1 + 2 = 3
2 + 8 = 10 → 0, carry 1
6 + 9 + 1 = 16 → 6, carry 1
9 + 7 + 1 = 17 → 7, carry 1
5 + 4 + 1 = 10 → 0, carry 1
3 + 5 + 1 = 9
7 + 6 = 13 → 13

→ 13,907,603

Check: 7,359,621 + 6,547,982 = 13,907,603 ✔

---

Problem 5:
```
5687128
+ 354136
----------
```

Note: Second number is 6 digits, first is 7 → align right:

```
5687128
+ 354136
---------
```

8 + 6 = 14 → 4, carry 1
2 + 3 + 1 = 6
1 + 1 = 2
7 + 4 = 11 → 1, carry 1
8 + 5 + 1 = 14 → 4, carry 1
6 + 3 + 1 = 10 → 0, carry 1
5 + 0 + 1 = 6

→ 6,041,264

Check: 5,687,128 + 354,136 = 6,041,264 ✔

---

Problem 6:
```
9375812
+ 1385735
---------
```

2 + 5 = 7
1 + 3 = 4
8 + 7 = 15 → 5, carry 1
5 + 5 + 1 = 11 → 1, carry 1
7 + 8 + 1 = 16 → 6, carry 1
3 + 3 + 1 = 7
9 + 1 = 10 → 10

→ 10,761,547

Check: 9,375,812 + 1,385,735 = 10,761,547 ✔

---

Problem 7:
```
3240589
+ 1569003
---------
```

9 + 3 = 12 → 2, carry 1
8 + 0 + 1 = 9
5 + 0 = 5
0 + 9 = 9
4 + 6 = 10 → 0, carry 1
2 + 5 + 1 = 8
3 + 1 = 4

→ 4,809,592

Check: 3,240,589 + 1,569,003 = 4,809,592 ✔

---

Problem 8:
```
1356287
+ 3506102
---------
```

7 + 2 = 9
8 + 0 = 8
2 + 1 = 3
6 + 6 = 12 → 2, carry 1
5 + 0 + 1 = 6
3 + 5 = 8
1 + 3 = 4

→ 4,862,389

Check: 1,356,287 + 3,506,102 = 4,862,389 ✔

---

Problem 9:
```
5349675
+ 5603908
---------
```

5 + 8 = 13 → 3, carry 1
7 + 0 + 1 = 8
6 + 9 = 15 → 5, carry 1
9 + 3 + 1 = 13 → 3, carry 1
4 + 0 + 1 = 5
3 + 6 = 9
5 + 5 = 10 → 10

→ 10,953,583

Check: 5,349,675 + 5,603,908 = 10,953,583 ✔

---

Problem 10:
```
5786569
+ 3532016
---------
```

9 + 6 = 15 → 5, carry 1
6 + 1 + 1 = 8
5 + 0 = 5
6 + 2 = 8
8 + 3 = 11 → 1, carry 1
7 + 5 + 1 = 13 → 3, carry 1
5 + 3 + 1 = 9

→ 9,318,585

Check: 5,786,569 + 3,532,016 = 9,318,585 ✔

---

Problem 11:
```
1357985
+ 3252708
---------
```

5 + 8 = 13 → 3, carry 1
8 + 0 + 1 = 9
9 + 7 = 16 → 6, carry 1
7 + 2 + 1 = 10 → 0, carry 1
5 + 5 + 1 = 11 → 1, carry 1
3 + 2 + 1 = 6
1 + 3 = 4

→ 4,610,693

Check: 1,357,985 + 3,252,708 = 4,610,693 ✔

---

Problem 12:
```
9565238
+ 6272383
---------
```

8 + 3 = 11 → 1, carry 1
3 + 8 + 1 = 12 → 2, carry 1
2 + 3 + 1 = 6
5 + 2 = 7
6 + 7 = 13 → 3, carry 1
5 + 2 + 1 = 8
9 + 6 = 15 → 15

→ 15,837,621

Check: 9,565,238 + 6,272,383 = 15,837,621 ✔

---

Problem 13: Three numbers!

```
5567138
3852127
+ 5610023
---------
```

Add all three together.

Start from right:

Units: 8 + 7 + 3 = 18 → 8, carry 1
Tens: 3 + 2 + 2 + 1 = 8
Hundreds: 1 + 1 + 0 = 2
Thousands: 7 + 2 + 0 = 9
Ten thousands: 6 + 5 + 1 = 12 → 2, carry 1
Hundred thousands: 5 + 8 + 6 + 1 = 20 → 0, carry 2
Millions: 5 + 3 + 5 + 2 = 15 → 15

→ 15,029,288

Check:

5,567,138
+3,852,127 = 9,419,265
+5,610,023 = 15,029,288 ✔

---

Problem 14: Three numbers

```
2353008
1674598
+ 299985
----------
```

Align:

```
2353008
1674598
+ 299985
---------
```

Right to left:

8 + 8 + 5 = 21 → 1, carry 2
0 + 9 + 8 + 2 = 19 → 9, carry 1
0 + 5 + 9 + 1 = 15 → 5, carry 1
3 + 4 + 9 + 1 = 17 → 7, carry 1
5 + 7 + 9 + 1 = 22 → 2, carry 2
3 + 6 + 2 + 2 = 13 → 3, carry 1
2 + 1 + 0 + 1 = 4

→ 4,327,591

Check:

2,353,008 + 1,674,598 = 4,027,606
+ 299,985 = 4,327,591 ✔

---

Problem 15: Three numbers

```
6973135
2853157
+ 1283976
---------
```

Right to left:

5 + 7 + 6 = 18 → 8, carry 1
3 + 5 + 7 + 1 = 16 → 6, carry 1
1 + 1 + 9 + 1 = 12 → 2, carry 1
3 + 3 + 3 + 1 = 10 → 0, carry 1
7 + 5 + 8 + 1 = 21 → 1, carry 2
9 + 8 + 2 + 2 = 21 → 1, carry 2
6 + 2 + 1 + 2 = 11 → 11

→ 11,110,268

Check:

6,973,135 + 2,853,157 = 9,826,292
+1,283,976 = 11,110,268 ✔

---

Final Answers:

1. 13,560,503
2. 7,001,816
3. 11,822,178
4. 13,907,603
5. 6,041,264
6. 10,761,547
7. 4,809,592
8. 4,862,389
9. 10,953,583
10. 9,318,585
11. 4,610,693
12. 15,837,621
13. 15,029,288
14. 4,327,591
15. 11,110,268

──────────────────────────────────────

Final Answer:
1. 13560503
2. 7001816
3. 11822178
4. 13907603
5. 6041264
6. 10761547
7. 4809592
8. 4862389
9. 10953583
10. 9318585
11. 4610693
12. 15837621
13. 15029288
14. 4327591
15. 11110268