Time to the Minute — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. If math class starts at 9:10 AM and lasts 50 minutes, it ends at 10:00 AM.
9:10 plus 50 minutes means you add 50 to 10, which gives 60 minutes -- that is a full hour, so the time rolls to 10:00 AM.
2. The minute hand on 5 means 25 minutes past the hour.
Each number on the clock stands for 5 minutes, so the 5 means 5 x 5 = 25 minutes past the hour.
3. From 7:25 AM to 8:00 AM, 35 minutes have passed.
From 7:25 to 8:00 you count forward 35 minutes because 60 - 25 = 35 minutes remain until the next hour.
4. If a swim lesson starts at 2:40 PM and lasts 25 minutes, it ends at 3:05 PM.
Adding 25 minutes to 2:40 gives 2:65, but since 65 is more than 60 you subtract 60 and move to the next hour: 3:05 PM.
5. The hour hand between 11 and 12 with the minute hand on 7 reads 11:35.
The minute hand on 7 means 7 x 5 = 35 minutes, and the hour hand between 11 and 12 shows the 11 o'clock hour, so the time is 11:35.
6. From 3:50 PM to 4:20 PM, 30 minutes have passed.
From 3:50 to 4:00 is 10 minutes, and from 4:00 to 4:20 is another 20 minutes, so 10 + 20 = 30 minutes total.
7. If the library opens at 8:00 AM and Tina arrives 22 minutes late, she gets there at 8:22.
Starting at 8:00 and counting forward 22 minutes lands on 8:22 because 0 + 22 = 22 minutes past the hour.
8. A clock with the minute hand on 9 shows 45 minutes past the hour.
The minute hand on the 9 means 9 x 5 = 45 minutes have passed since the hour began.
9. From 5:15 PM to 6:00 PM, 45 minutes have passed.
From 5:15 to 6:00, you need 60 - 15 = 45 more minutes to reach the next full hour.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each activity's start and duration to the correct end time.
Start 10:15, add 30 min
→ 10:45
8:55
Start 2:50, add 20 min
→ 3:10
3:10
Start 6:35, add 25 min
→ 7:00
7:00
Start 8:40, add 15 min
→ 8:55
10:45
Correct matches: Start 10:15, add 30 min → 10:45; Start 2:50, add 20 min → 3:10; Start 6:35, add 25 min → 7:00; Start 8:40, add 15 min → 8:55.