Printable primary math worksheet for math grades 1 to 6 based on ... - Free Printable

To find the End Time, we add the Elapsed Time to the Start Time.

We do this in two steps:
1. Add the hours.
2. Add the minutes.

*Note: If the minutes add up to 60 or more, we convert 60 minutes into 1 hour and add it to the total hours.*

Here is the step-by-step calculation for each row:

1. Start: 09.20 + Elapsed: 1 h 10 min
* Hours: $9 + 1 = 10$
* Minutes: $20 + 10 = 30$
* End: 10.30

2. Start: 06.00 + Elapsed: 3 h 10 min
* Hours: $6 + 3 = 9$
* Minutes: $00 + 10 = 10$
* End: 09.10

3. Start: 03.10 + Elapsed: 7 h 30 min
* Hours: $3 + 7 = 10$
* Minutes: $10 + 30 = 40$
* End: 10.40

4. Start: 09.25 + Elapsed: 2 h 50 min
* Hours: $9 + 2 = 11$
* Minutes: $25 + 50 = 75$ minutes. Since 75 minutes is 1 hour and 15 minutes, we add 1 to the hours.
* New Hours: $11 + 1 = 12$
* New Minutes: 15
* End: 12.15

5. Start: 04.20 + Elapsed: 3 h 10 min
* Hours: $4 + 3 = 7$
* Minutes: $20 + 10 = 30$
* End: 07.30

6. Start: 05.15 + Elapsed: 3 h 5 min
* Hours: $5 + 3 = 8$
* Minutes: $15 + 5 = 20$
* End: 08.20

7. Start: 07.30 + Elapsed: 4 h 10 min
* Hours: $7 + 4 = 11$
* Minutes: $30 + 10 = 40$
* End: 11.40

8. Start: 02.10 + Elapsed: 3 h 5 min
* Hours: $2 + 3 = 5$
* Minutes: $10 + 5 = 15$
* End: 05.15

9. Start: 02.40 + Elapsed: 8 h 30 min
* Hours: $2 + 8 = 10$
* Minutes: $40 + 30 = 70$ minutes. Since 70 minutes is 1 hour and 10 minutes, we add 1 to the hours.
* New Hours: $10 + 1 = 11$
* New Minutes: 10
* End: 11.10

10. Start: 06.40 + Elapsed: 2 h 10 min
* Hours: $6 + 2 = 8$
* Minutes: $40 + 10 = 50$
* End: 08.50

11. Start: 03.40 + Elapsed: 3 h 30 min
* Hours: $3 + 3 = 6$
* Minutes: $40 + 30 = 70$ minutes. Since 70 minutes is 1 hour and 10 minutes, we add 1 to the hours.
* New Hours: $6 + 1 = 7$
* New Minutes: 10
* End: 07.10

12. Start: 08.10 + Elapsed: 3 h 20 min
* Hours: $8 + 3 = 11$
* Minutes: $10 + 20 = 30$
* End: 11.30

13. Start: 05.40 + Elapsed: 4 h 30 min
* Hours: $5 + 4 = 9$
* Minutes: $40 + 30 = 70$ minutes. Since 70 minutes is 1 hour and 10 minutes, we add 1 to the hours.
* New Hours: $9 + 1 = 10$
* New Minutes: 10
* End: 10.10

Final Answer:
| Start | End | Elapsed Time |
| :--- | :--- | :--- |
| 09.20 | 10.30 | 1 h 10 min |
| 06.00 | 09.10 | 3 h 10 min |
| 03.10 | 10.40 | 7 h 30 min |
| 09.25 | 12.15 | 2 h 50 min |
| 04.20 | 07.30 | 3 h 10 min |
| 05.15 | 08.20 | 3 h 5 min |
| 07.30 | 11.40 | 4 h 10 min |
| 02.10 | 05.15 | 3 h 5 min |
| 02.40 | 11.10 | 8 h 30 min |
| 06.40 | 08.50 | 2 h 10 min |
| 03.40 | 07.10 | 3 h 30 min |
| 08.10 | 11.30 | 3 h 20 min |
| 05.40 | 10.10 | 4 h 30 min |