Problem Analysis:
The task involves solving time word problems by calculating the duration between two given times. We will solve each problem step by step.
---
Problem 1:
Question: Recess began at 11:12 am. It ended at 11:44 am. How long was recess?
#### Solution:
1.
Start Time: 11:12 am
2.
End Time: 11:44 am
3.
Duration Calculation:
- The difference in minutes between 11:44 and 11:12 is calculated as follows:
\[
44 \text{ minutes} - 12 \text{ minutes} = 32 \text{ minutes}
\]
4.
Answer: The duration of recess is
32 minutes.
#### Correct Option:
-
C. 32 minutes
---
Problem 2:
Question: The assembly started at 3:02 pm. It ended at 3:58 pm. How long was the assembly?
#### Solution:
1.
Start Time: 3:02 pm
2.
End Time: 3:58 pm
3.
Duration Calculation:
- The difference in minutes between 3:58 and 3:02 is calculated as follows:
\[
58 \text{ minutes} - 02 \text{ minutes} = 56 \text{ minutes}
\]
4.
Answer: The duration of the assembly is
56 minutes.
#### Correct Option:
-
B. 56 minutes
---
Problem 3:
Question: Soccer practice began at 8:35 am. It ended at 9:50 am. How long was soccer practice?
#### Solution:
1.
Start Time: 8:35 am
2.
End Time: 9:50 am
3.
Duration Calculation:
- First, calculate the minutes from 8:35 to 9:00:
\[
9:00 - 8:35 = 25 \text{ minutes}
\]
- Then, add the remaining time from 9:00 to 9:50:
\[
9:50 - 9:00 = 50 \text{ minutes}
\]
- Total duration:
\[
25 \text{ minutes} + 50 \text{ minutes} = 75 \text{ minutes}
\]
- Convert 75 minutes into hours and minutes:
\[
75 \text{ minutes} = 1 \text{ hour and } 15 \text{ minutes}
\]
4.
Answer: The duration of soccer practice is
1 hour and 15 minutes.
#### Correct Option:
-
C. 1 hour and 15 minutes
---
Problem 4:
Question: Our lunch started at 12:00 pm. We finished at 1:05 pm. How long was our lunch?
#### Solution:
1.
Start Time: 12:00 pm
2.
End Time: 1:05 pm
3.
Duration Calculation:
- The difference in time between 1:05 pm and 12:00 pm is:
\[
1 \text{ hour and } 05 \text{ minutes}
\]
4.
Answer: The duration of lunch is
1 hour and 5 minutes.
#### Correct Option:
-
Not provided in the options. However, if we assume the closest option, it would be:
-
D. 65 minutes (since 1 hour and 5 minutes = 65 minutes)
---
Final Answers:
1.
C. 32 minutes
2.
B. 56 minutes
3.
C. 1 hour and 15 minutes
4.
D. 65 minutes (assuming the closest option)
Boxed Final Answer:
\[
\boxed{C, B, C, D}
\]
Parent Tip: Review the logic above to help your child master the concept of time word problem worksheet.
