Let’s solve each problem one by one. Remember, we are adding or subtracting without regrouping — that means no carrying over in addition and no borrowing in subtraction. We’ll line up the numbers by place value (ones under ones, tens under tens, etc.) and work column by column from right to left.
---
Problem 1: 5615 + 62
Write it vertically:
```
5615
+ 62
------
```
Start from the right:
- Ones: 5 + 2 = 7
- Tens: 1 + 6 = 7
- Hundreds: 6 + 0 = 6
- Thousands: 5 + 0 = 5
Answer:
5677
---
Problem 2: 3102 + 95
```
3102
+ 95
------
```
- Ones: 2 + 5 = 7
- Tens: 0 + 9 = 9
- Hundreds: 1 + 0 = 1
- Thousands: 3 + 0 = 3
Answer:
3197
---
Problem 3: 5616 + 41
```
5616
+ 41
------
```
- Ones: 6 + 1 = 7
- Tens: 1 + 4 = 5
- Hundreds: 6 + 0 = 6
- Thousands: 5 + 0 = 5
Answer:
5657
---
Problem 4: 8464 + 24
```
8464
+ 24
------
```
- Ones: 4 + 4 = 8
- Tens: 6 + 2 = 8
- Hundreds: 4 + 0 = 4
- Thousands: 8 + 0 = 8
Answer:
8488
---
Problem 5: 1685 - 42
```
1685
- 42
------
```
- Ones: 5 - 2 = 3
- Tens: 8 - 4 = 4
- Hundreds: 6 - 0 = 6
- Thousands: 1 - 0 = 1
Answer:
1643
---
Problem 6: 9078 - 73
```
9078
- 73
------
```
- Ones: 8 - 3 = 5
- Tens: 7 - 7 = 0
- Hundreds: 0 - 0 = 0
- Thousands: 9 - 0 = 9
Answer:
9005
---
Problem 7: 9458 - 38
```
9458
- 38
------
```
- Ones: 8 - 8 = 0
- Tens: 5 - 3 = 2
- Hundreds: 4 - 0 = 4
- Thousands: 9 - 0 = 9
Answer:
9420
---
Problem 8: 5289 - 75
```
5289
- 75
------
```
- Ones: 9 - 5 = 4
- Tens: 8 - 7 = 1
- Hundreds: 2 - 0 = 2
- Thousands: 5 - 0 = 5
Answer:
5214
---
Problem 9: 8067 - 21
```
8067
- 21
------
```
- Ones: 7 - 1 = 6
- Tens: 6 - 2 = 4
- Hundreds: 0 - 0 = 0
- Thousands: 8 - 0 = 8
Answer:
8046
---
Final Answer:
5677, 3197, 5657, 8488, 1643, 9005, 9420, 5214, 8046
Parent Tip: Review the logic above to help your child master the concept of math problems 4th grade.
