Problem Description:
The task involves solving a series of addition and subtraction problems involving monetary values. The goal is to calculate the sum or difference for each pair of numbers provided.
Solution:
#### Step 1: Understand the Format
Each problem involves either adding (`+`) or subtracting (`-`) two monetary values. We need to perform the calculations carefully, ensuring that we align the decimal points correctly.
#### Step 2: Solve Each Problem
1.
Problem 1: $98.69 + 27.71
- Align the decimal points:
```
98.69
+ 27.71
------
126.40
```
-
Answer: $126.40
2.
Problem 2: $31.80 - 20.77
- Align the decimal points:
```
31.80
- 20.77
------
11.03
```
-
Answer: $11.03
3.
Problem 3: $86.93 + 74.50
- Align the decimal points:
```
86.93
+ 74.50
------
161.43
```
-
Answer: $161.43
4.
Problem 4: $47.29 - 30.79
- Align the decimal points:
```
47.29
- 30.79
------
16.50
```
-
Answer: $16.50
5.
Problem 5: $52.16 - 42.00
- Align the decimal points:
```
52.16
- 42.00
------
10.16
```
-
Answer: $10.16
6.
Problem 6: $31.97 - 1.50
- Align the decimal points:
```
31.97
- 1.50
------
30.47
```
-
Answer: $30.47
7.
Problem 7: $99.95 + 94.92
- Align the decimal points:
```
99.95
+ 94.92
------
194.87
```
-
Answer: $194.87
8.
Problem 8: $6.56 + 52.48
- Align the decimal points:
```
6.56
+ 52.48
------
59.04
```
-
Answer: $59.04
9.
Problem 9: $53.26 - 48.73
- Align the decimal points:
```
53.26
- 48.73
------
4.53
```
-
Answer: $4.53
10.
Problem 10: $66.36 - 1.87
- Align the decimal points:
```
66.36
- 1.87
------
64.49
```
-
Answer: $64.49
11.
Problem 11: $34.54 + 0.71
- Align the decimal points:
```
34.54
+ 0.71
------
35.25
```
-
Answer: $35.25
12.
Problem 12: $39.97 + 0.79
- Align the decimal points:
```
39.97
+ 0.79
------
40.76
```
-
Answer: $40.76
#### Step 3: Compile the Answers
Here are the final answers for all the problems:
1. $126.40
2. $11.03
3. $161.43
4. $16.50
5. $10.16
6. $30.47
7. $194.87
8. $59.04
9. $4.53
10. $64.49
11. $35.25
12. $40.76
Final Answer:
\[
\boxed{
\begin{array}{ll}
1. & \$126.40 \\
2. & \$11.03 \\
3. & \$161.43 \\
4. & \$16.50 \\
5. & \$10.16 \\
6. & \$30.47 \\
7. & \$194.87 \\
8. & \$59.04 \\
9. & \$4.53 \\
10. & \$64.49 \\
11. & \$35.25 \\
12. & \$40.76 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of mathematical problem solving worksheet.
