Addition worksheet for kids with 15 problems involving large numbers.

Here's the solution to all 15 addition problems from the worksheet, with step-by-step explanations for each.

---

Problem 1: 285,628 + 499,320

```
285,628
+ 499,320
----------
```

Add column by column from right to left:

- Units: 8 + 0 = 8
- Tens: 2 + 2 = 4
- Hundreds: 6 + 3 = 9
- Thousands: 5 + 9 = 14 → write 4, carry 1
- Ten thousands: 8 + 9 + 1 (carry) = 18 → write 8, carry 1
- Hundred thousands: 2 + 4 + 1 (carry) = 7

✔ Answer: 784,948

---

Problem 2: 584,420 + 945,555

```
584,420
+ 945,555
----------
```

- Units: 0 + 5 = 5
- Tens: 2 + 5 = 7
- Hundreds: 4 + 5 = 9
- Thousands: 4 + 5 = 9
- Ten thousands: 8 + 4 = 12 → write 2, carry 1
- Hundred thousands: 5 + 9 + 1 = 15 → write 5, carry 1 → add new digit: 1

✔ Answer: 1,529,975

---

Problem 3: 998,164 + 771,879

```
998,164
+ 771,879
----------
```

- Units: 4 + 9 = 13 → write 3, carry 1
- Tens: 6 + 7 + 1 = 14 → write 4, carry 1
- Hundreds: 1 + 8 + 1 = 10 → write 0, carry 1
- Thousands: 8 + 1 + 1 = 10 → write 0, carry 1
- Ten thousands: 9 + 7 + 1 = 17 → write 7, carry 1
- Hundred thousands: 9 + 7 + 1 = 17 → write 7, carry 1 → add new digit: 1

✔ Answer: 1,770,043

---

Problem 4: 140,118 + 658,008

```
140,118
+ 658,008
----------
```

- Units: 8 + 8 = 16 → write 6, carry 1
- Tens: 1 + 0 + 1 = 2
- Hundreds: 1 + 0 = 1
- Thousands: 0 + 8 = 8
- Ten thousands: 4 + 5 = 9
- Hundred thousands: 1 + 6 = 7

✔ Answer: 798,126

---

Problem 5: 766,056 + 544,470

```
766,056
+ 544,470
----------
```

- Units: 6 + 0 = 6
- Tens: 5 + 7 = 12 → write 2, carry 1
- Hundreds: 0 + 4 + 1 = 5
- Thousands: 6 + 4 = 10 → write 0, carry 1
- Ten thousands: 6 + 4 + 1 = 11 → write 1, carry 1
- Hundred thousands: 7 + 5 + 1 = 13 → write 3, carry 1 → add new digit: 1

✔ Answer: 1,310,526

---

Problem 6: 77,473 + 300,156

```
77,473
+ 300,156
----------
```

Align by place value:

- Units: 3 + 6 = 9
- Tens: 7 + 5 = 12 → write 2, carry 1
- Hundreds: 4 + 1 + 1 = 6
- Thousands: 7 + 0 = 7
- Ten thousands: 7 + 0 = 7
- Hundred thousands: 0 + 3 = 3

✔ Answer: 377,629

---

Problem 7: 569,407 + 629,391

```
569,407
+ 629,391
----------
```

- Units: 7 + 1 = 8
- Tens: 0 + 9 = 9
- Hundreds: 4 + 3 = 7
- Thousands: 9 + 9 = 18 → write 8, carry 1
- Ten thousands: 6 + 2 + 1 = 9
- Hundred thousands: 5 + 6 = 11 → write 1, carry 1 → add new digit: 1

✔ Answer: 1,198,798

---

Problem 8: 204,823 + 498,669

```
204,823
+ 498,669
----------
```

- Units: 3 + 9 = 12 → write 2, carry 1
- Tens: 2 + 6 + 1 = 9
- Hundreds: 8 + 6 = 14 → write 4, carry 1
- Thousands: 4 + 8 + 1 = 13 → write 3, carry 1
- Ten thousands: 0 + 9 + 1 = 10 → write 0, carry 1
- Hundred thousands: 2 + 4 + 1 = 7

✔ Answer: 703,492

---

Problem 9: 243,993 + 587,307

```
243,993
+ 587,307
----------
```

- Units: 3 + 7 = 10 → write 0, carry 1
- Tens: 9 + 0 + 1 = 10 → write 0, carry 1
- Hundreds: 9 + 3 + 1 = 13 → write 3, carry 1
- Thousands: 3 + 7 + 1 = 11 → write 1, carry 1
- Ten thousands: 4 + 8 + 1 = 13 → write 3, carry 1
- Hundred thousands: 2 + 5 + 1 = 8

✔ Answer: 831,300

---

Problem 10: 991,628 + 250,250

```
991,628
+ 250,250
----------
```

- Units: 8 + 0 = 8
- Tens: 2 + 5 = 7
- Hundreds: 6 + 2 = 8
- Thousands: 1 + 0 = 1
- Ten thousands: 9 + 5 = 14 → write 4, carry 1
- Hundred thousands: 9 + 2 + 1 = 12 → write 2, carry 1 → add new digit: 1

✔ Answer: 1,241,878

---

Problem 11: 589,379 + 280,303

```
589,379
+ 280,303
----------
```

- Units: 9 + 3 = 12 → write 2, carry 1
- Tens: 7 + 0 + 1 = 8
- Hundreds: 3 + 3 = 6
- Thousands: 9 + 0 = 9
- Ten thousands: 8 + 8 = 16 → write 6, carry 1
- Hundred thousands: 5 + 2 + 1 = 8

✔ Answer: 869,682

---

Problem 12: 564,332 + 913,870

```
564,332
+ 913,870
----------
```

- Units: 2 + 0 = 2
- Tens: 3 + 7 = 10 → write 0, carry 1
- Hundreds: 3 + 8 + 1 = 12 → write 2, carry 1
- Thousands: 4 + 3 + 1 = 8
- Ten thousands: 6 + 1 = 7
- Hundred thousands: 5 + 9 = 14 → write 4, carry 1 → add new digit: 1

✔ Answer: 1,478,202

---

Problem 13: 748,546 + 555,787

```
748,546
+ 555,787
----------
```

- Units: 6 + 7 = 13 → write 3, carry 1
- Tens: 4 + 8 + 1 = 13 → write 3, carry 1
- Hundreds: 5 + 7 + 1 = 13 → write 3, carry 1
- Thousands: 8 + 5 + 1 = 14 → write 4, carry 1
- Ten thousands: 4 + 5 + 1 = 10 → write 0, carry 1
- Hundred thousands: 7 + 5 + 1 = 13 → write 3, carry 1 → add new digit: 1

✔ Answer: 1,304,333

---

Problem 14: 104,994 + 840,842

```
104,994
+ 840,842
----------
```

- Units: 4 + 2 = 6
- Tens: 9 + 4 = 13 → write 3, carry 1
- Hundreds: 9 + 8 + 1 = 18 → write 8, carry 1
- Thousands: 4 + 0 + 1 = 5
- Ten thousands: 0 + 4 = 4
- Hundred thousands: 1 + 8 = 9

✔ Answer: 945,836

---

Problem 15: 537,873 + 393,980

```
537,873
+ 393,980
----------
```

- Units: 3 + 0 = 3
- Tens: 7 + 8 = 15 → write 5, carry 1
- Hundreds: 8 + 9 + 1 = 18 → write 8, carry 1
- Thousands: 7 + 3 + 1 = 11 → write 1, carry 1
- Ten thousands: 3 + 9 + 1 = 13 → write 3, carry 1
- Hundred thousands: 5 + 3 + 1 = 9

✔ Answer: 931,853

---

## ✔ Final Answers Summary:

1. 784,948
2. 1,529,975
3. 1,770,043
4. 798,126
5. 1,310,526
6. 377,629
7. 1,198,798
8. 703,492
9. 831,300
10. 1,241,878
11. 869,682
12. 1,478,202
13. 1,304,333
14. 945,836
15. 931,853

---

📌 *Tip for students:* Always align numbers by place value and add from right to left, carrying over when a column sum is 10 or more. Double-check your carries!

Let me know if you'd like a printable version or step-by-step visuals for any problem!