Let’s solve each clock problem step by step. We’ll read the time on each clock first, then do the adding or subtracting as asked.
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Clock 1:
- The hour hand is just past 12, and the minute hand is on 9 → that’s
12:45.
Now answer the questions:
1. If you arrived 1 hour and 10 minutes earlier:
12:45 minus 1 hour = 11:45
11:45 minus 10 minutes =
11:35
2. What time is it 1 hour and 40 minutes later?
12:45 + 1 hour = 1:45
1:45 + 40 minutes = 2:25 →
2:25
3. Subtract 20 minutes from 12:45:
12:45 - 20 minutes =
12:25
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Clock 2:
- Hour hand between 9 and 10, minute hand on 6 → that’s
9:30
Questions:
1. Subtract 1 hour and 20 minutes:
9:30 - 1 hour = 8:30
8:30 - 20 minutes =
8:10
2. 10 minutes later:
9:30 + 10 =
9:40
3. 1 hour later:
9:30 + 1 hour =
10:30
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Clock 3:
- Hour hand near 11, minute hand on 3 → that’s
11:15
Questions:
1. In 30 minutes:
11:15 + 30 =
11:45
2. Arrived 1 hour earlier:
11:15 - 1 hour =
10:15
3. Add 1 hour and 20 minutes:
11:15 + 1 hour = 12:15
12:15 + 20 minutes =
12:35
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Clock 4:
- Hour hand between 5 and 6, minute hand on 6 → that’s
5:30
Questions:
1. In 1 hour and 30 minutes:
5:30 + 1 hour = 6:30
6:30 + 30 minutes =
7:00
2. 20 minutes ago:
5:30 - 20 minutes =
5:10
3. 10 minutes later:
5:30 + 10 =
5:40
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Final Answer:
Clock 1:
Current time: 12:45
1 hour 10 min earlier: 11:35
1 hour 40 min later: 2:25
Subtract 20 min: 12:25
Clock 2:
Current time: 9:30
Subtract 1 hr 20 min: 8:10
10 min later: 9:40
1 hr later: 10:30
Clock 3:
Current time: 11:15
In 30 min: 11:45
1 hr earlier: 10:15
Add 1 hr 20 min: 12:35
Clock 4:
Current time: 5:30
In 1 hr 30 min: 7:00
20 min ago: 5:10
10 min later: 5:40
Parent Tip: Review the logic above to help your child master the concept of timed addition worksheet for.
