Problem Description:
The task is to solve a series of subtraction problems by subtracting the second number from the first number in each pair. The problems are organized into columns, and we need to perform column subtraction for each pair.
Solution Approach:
1.
Understand the Structure: Each problem consists of two numbers where the second number is subtracted from the first.
2.
Perform Subtraction: Subtract the smaller number from the larger number for each pair.
3.
Handle Borrowing: If necessary, use borrowing (regrouping) when subtracting digits in the same place value.
4.
Write Down the Answers: Record the results below each pair.
Step-by-Step Solution:
#### Problems 1 to 4:
1. \( 33 - 21 \):
```
33
- 21
----
12
```
Answer:
12
2. \( 67 - 32 \):
```
67
- 32
----
35
```
Answer:
35
3. \( 98 - 30 \):
```
98
- 30
----
68
```
Answer:
68
4. \( 19 - 15 \):
```
19
- 15
----
4
```
Answer:
4
#### Problems 5 to 8:
5. \( 55 - 44 \):
```
55
- 44
----
11
```
Answer:
11
6. \( 63 - 37 \):
```
63
- 37
----
26
```
Answer:
26
7. \( 22 - 18 \):
```
22
- 18
----
4
```
Answer:
4
8. \( 84 - 60 \):
```
84
- 60
----
24
```
Answer:
24
#### Problems 9 to 12:
9. \( 69 - 51 \):
```
69
- 51
----
18
```
Answer:
18
10. \( 75 - 48 \):
```
75
- 48
----
27
```
Answer:
27
11. \( 97 - 72 \):
```
97
- 72
----
25
```
Answer:
25
12. \( 49 - 25 \):
```
49
- 25
----
24
```
Answer:
24
#### Problems 13 to 16:
13. \( 745 - 123 \):
```
745
- 123
------
622
```
Answer:
622
14. \( 200 - 170 \):
```
200
- 170
------
30
```
Answer:
30
15. \( 335 - 212 \):
```
335
- 212
------
123
```
Answer:
123
16. \( 888 - 406 \):
```
888
- 406
------
482
```
Answer:
482
#### Problems 17 to 20:
17. \( 663 - 151 \):
```
663
- 151
------
512
```
Answer:
512
18. \( 432 - 115 \):
```
432
- 115
------
317
```
Answer:
317
19. \( 534 - 321 \):
```
534
- 321
------
213
```
Answer:
213
20. \( 940 - 267 \):
```
940
- 267
------
673
```
Answer:
673
Final Answers:
\[
\boxed{
\begin{array}{cccc}
1. & 12 & 2. & 35 & 3. & 68 & 4. & 4 \\
5. & 11 & 6. & 26 & 7. & 4 & 8. & 24 \\
9. & 18 & 10. & 27 & 11. & 25 & 12. & 24 \\
13. & 622 & 14. & 30 & 15. & 123 & 16. & 482 \\
17. & 512 & 18. & 317 & 19. & 213 & 20. & 673 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of free math worksheet grade 4.
