Math worksheet with addition and subtraction exercises on a grid.

Let’s solve each problem step by step. We’ll do addition first, then subtraction.

---

Addition Problems:

1. 996 + 978

Start from the right (ones place):

- 6 + 8 = 14 → write down 4, carry over 1
- 9 + 7 + 1 (carry) = 17 → write down 7, carry over 1
- 9 + 9 + 1 (carry) = 19 → write down 19

→ 1974

2. 896 + 968

- 6 + 8 = 14 → write 4, carry 1
- 9 + 6 + 1 = 16 → write 6, carry 1
- 8 + 9 + 1 = 18 → write 18

→ 1864

3. 795 + 998

- 5 + 8 = 13 → write 3, carry 1
- 9 + 9 + 1 = 19 → write 9, carry 1
- 7 + 9 + 1 = 17 → write 17

→ 1793

4. 598 + 958

- 8 + 8 = 16 → write 6, carry 1
- 9 + 5 + 1 = 15 → write 5, carry 1
- 5 + 9 + 1 = 15 → write 15

→ 1556

5. 597 + 938

- 7 + 8 = 15 → write 5, carry 1
- 9 + 3 + 1 = 13 → write 3, carry 1
- 5 + 9 + 1 = 15 → write 15

→ 1535

6. 596 + 928

- 6 + 8 = 14 → write 4, carry 1
- 9 + 2 + 1 = 12 → write 2, carry 1
- 5 + 9 + 1 = 15 → write 15

→ 1524

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Subtraction Problems:

1. 926 - 658

Start from right:

- 6 - 8 → can’t do, borrow from tens. Tens is 2, so borrow from hundreds.
- Hundreds: 9 becomes 8
- Tens: 2 becomes 12
- Now ones: 6 becomes 16 → 16 - 8 = 8
- Tens: 12 - 5 = 7 (but we borrowed, so it’s now 1? Wait — let’s redo carefully)

Actually:

Write it as:

```
926
- 658
-----
```

Ones: 6 < 8 → borrow from tens. But tens digit is 2 → need to borrow from hundreds.

Hundreds: 9 → 8
Tens: 2 → 12
Now ones: 6 → 16 → 16 - 8 = 8
Tens: 12 - 5 = 7? Wait — no! After borrowing, tens became 12, but we used 1 for ones, so tens are now 11? No — actually:

When you borrow from tens to ones, the tens digit reduces by 1.

But since tens was 2 and we had to borrow for ones, we must borrow from hundreds first.

So:

- Hundreds: 9 → 8
- Tens: 2 → 12
- Then borrow 1 from tens to ones → tens become 11, ones become 16

Now:

Ones: 16 - 8 = 8
Tens: 11 - 5 = 6
Hundreds: 8 - 6 = 2

→ 268

Wait — let me check with another method:

926 - 658 = ?

658 + 268 = 658 + 200 = 858; 858 + 68 = 926 → yes! Correct.

→ 268

2. 835 - 368

```
835
- 368
-----
```

Ones: 5 < 8 → borrow from tens. Tens is 3 → borrow from hundreds.

Hundreds: 8 → 7
Tens: 3 → 13
Then borrow 1 from tens to ones → tens become 12, ones become 15

Ones: 15 - 8 = 7
Tens: 12 - 6 = 6
Hundreds: 7 - 3 = 4

→ 467

Check: 368 + 467 = 368 + 400 = 768; 768 + 67 = 835 → correct.

→ 467

3. 956 - 598

```
956
- 598
-----
```

Ones: 6 < 8 → borrow from tens. Tens is 5 → borrow from hundreds.

Hundreds: 9 → 8
Tens: 5 → 15
Borrow 1 to ones → tens become 14, ones become 16

Ones: 16 - 8 = 8
Tens: 14 - 9 = 5
Hundreds: 8 - 5 = 3

→ 358

Check: 598 + 358 = 598 + 300 = 898; 898 + 58 = 956 → correct.

→ 358

4. 923 - 567

```
923
- 567
-----
```

Ones: 3 < 7 → borrow from tens. Tens is 2 → borrow from hundreds.

Hundreds: 9 → 8
Tens: 2 → 12
Borrow 1 to ones → tens become 11, ones become 13

Ones: 13 - 7 = 6
Tens: 11 - 6 = 5
Hundreds: 8 - 5 = 3

→ 356

Check: 567 + 356 = 567 + 300 = 867; 867 + 56 = 923 → correct.

→ 356

5. 753 - 378

```
753
- 378
-----
```

Ones: 3 < 8 → borrow from tens. Tens is 5 → okay.

Tens: 5 → 4
Ones: 3 → 13 → 13 - 8 = 5
Tens: 4 < 7 → borrow from hundreds.

Hundreds: 7 → 6
Tens: 4 → 14 → 14 - 7 = 7
Hundreds: 6 - 3 = 3

→ 375

Check: 378 + 375 = 378 + 300 = 678; 678 + 75 = 753 → correct.

→ 375

6. 823 - 386

```
823
- 386
-----
```

Ones: 3 < 6 → borrow from tens. Tens is 2 → borrow from hundreds.

Hundreds: 8 → 7
Tens: 2 → 12
Borrow 1 to ones → tens become 11, ones become 13

Ones: 13 - 6 = 7
Tens: 11 - 8 = 3
Hundreds: 7 - 3 = 4

→ 437

Check: 386 + 437 = 386 + 400 = 786; 786 + 37 = 823 → correct.

→ 437

---

Final Answer:

Addition:
996 + 978 = 1974
896 + 968 = 1864
795 + 998 = 1793
598 + 958 = 1556
597 + 938 = 1535
596 + 928 = 1524

Subtraction:
926 - 658 = 268
835 - 368 = 467
956 - 598 = 358
923 - 567 = 356
753 - 378 = 375
823 - 386 = 437