Mathematics worksheet for Class V students at Tagore International School, New Delhi, featuring addition and subtraction of large numbers.

I'll solve each addition and subtraction problem step by step.

Problem 1:
```
6045173
+ 2146185
---------
```
Starting from the right:
- 3 + 5 = 8
- 7 + 8 = 15 (write 5, carry 1)
- 1 + 1 + 1 = 3
- 5 + 6 = 11 (write 1, carry 1)
- 1 + 4 + 4 = 9
- 0 + 1 = 1
- 6 + 2 = 8

Answer: 8191358

Problem 2:
```
1274538
+ 6382714
---------
```
- 8 + 4 = 12 (write 2, carry 1)
- 1 + 3 + 1 = 5
- 5 + 7 = 12 (write 2, carry 1)
- 1 + 4 + 2 = 7
- 7 + 8 = 15 (write 5, carry 1)
- 1 + 2 + 3 = 6
- 1 + 6 = 7

Answer: 7657252

Problem 3:
```
6291873
+ 1028372
+ 352604
---------
```
First add: 6291873 + 1028372 = 7320245
Then: 7320245 + 352604 = 7672849

Let me verify:
- 3 + 2 + 4 = 9
- 7 + 7 + 0 = 14 (write 4, carry 1)
- 1 + 8 + 3 + 6 = 18 (write 8, carry 1)
- 1 + 1 + 3 + 2 = 7
- 9 + 2 + 5 = 16 (write 6, carry 1)
- 1 + 2 + 0 + 3 = 6
- 6 + 1 = 7

Answer: 7672849

Problem 4:
```
6356213
+ 4038267
+ 1627392
---------
```
- 3 + 7 + 2 = 12 (write 2, carry 1)
- 1 + 1 + 6 + 9 = 17 (write 7, carry 1)
- 1 + 2 + 2 + 3 = 8
- 6 + 8 + 7 = 21 (write 1, carry 2)
- 2 + 5 + 3 + 2 = 12 (write 2, carry 1)
- 1 + 3 + 0 + 6 = 10 (write 0, carry 1)
- 1 + 6 + 4 + 1 = 12

Answer: 12021872

Problem 5:
```
4569878
- 30562
---------
```
Aligning properly:
```
4569878
- 30562
---------
```
- 8 - 2 = 6
- 7 - 6 = 1
- 8 - 5 = 3
- 9 - 0 = 9
- 6 - 3 = 3
- 5 - 0 = 5
- 4 - 0 = 4

Answer: 4539316

Problem 6:
```
6547890
- 196217
---------
```
- 0 - 7: need to borrow → 10 - 7 = 3
- 8 becomes 8, then 8 - 1 = 7 (after borrowing)
Wait, let me redo this carefully:

```
6547890
- 196217
---------
```
- 0 - 7: borrow from 9 → 10 - 7 = 3
- 8 - 1 = 7 (9 became 8 after lending)
- 8 - 2 = 6
- 7 - 6 = 1
- 4 - 9: borrow from 5 → 14 - 9 = 5
- 4 - 1 = 3 (5 became 4)
- 6 - 0 = 6

Answer: 6351673

Final Answer:
1) 8191358
2) 7657252
3) 7672849
4) 12021872
5) 4539316
6) 6351673