To solve these time conversion problems, we need to remember the basic relationships between units of time:
- 1 hour = 60 minutes
- 1 minute = 60 seconds
- 1 day = 24 hours
We’ll convert everything into the smaller unit asked for in each problem.
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Problem 1: 9 hours 30 minutes = ___ minutes
→ Convert hours to minutes: 9 × 60 = 540 minutes
→ Add extra 30 minutes: 540 + 30 =
570 minutes
✔ Check: 9×60=540, +30=570 → Correct
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Problem 2: 7 minutes 45 seconds = ___ seconds
→ Convert minutes to seconds: 7 × 60 = 420 seconds
→ Add extra 45 seconds: 420 + 45 =
465 seconds
✔ Check: 7×60=420, +45=465 → Correct
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Problem 3: 9 days 20 hours = ___ hours
→ Convert days to hours: 9 × 24 = 216 hours
→ Add extra 20 hours: 216 + 20 =
236 hours
✔ Check: 9×24=216, +20=236 → Correct
---
Problem 4: 10 minutes 27 seconds = ___ seconds
→ Convert minutes to seconds: 10 × 60 = 600 seconds
→ Add extra 27 seconds: 600 + 27 =
627 seconds
✔ Check: 10×60=600, +27=627 → Correct
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Problem 5: 13 days 19 hours = ___ hours
→ Convert days to hours: 13 × 24 = 312 hours
→ Add extra 19 hours: 312 + 19 =
331 hours
✔ Check: 13×24=312, +19=331 → Correct
---
Problem 6: 6 hours 5 minutes = ___ minutes
→ Convert hours to minutes: 6 × 60 = 360 minutes
→ Add extra 5 minutes: 360 + 5 =
365 minutes
✔ Check: 6×60=360, +5=365 → Correct
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Problem 7: 10 hours 30 minutes = ___ minutes
→ Convert hours to minutes: 10 × 60 = 600 minutes
→ Add extra 30 minutes: 600 + 30 =
630 minutes
✔ Check: 10×60=600, +30=630 → Correct
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Problem 8: 6 minutes 15 seconds = ___ seconds
→ Convert minutes to seconds: 6 × 60 = 360 seconds
→ Add extra 15 seconds: 360 + 15 =
375 seconds
✔ Check: 6×60=360, +15=375 → Correct
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Problem 9: 4 days 20 hours = ___ hours
→ Convert days to hours: 4 × 24 = 96 hours
→ Add extra 20 hours: 96 + 20 =
116 hours
✔ Check: 4×24=96, +20=116 → Correct
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Problem 10: 3 minutes 45 seconds = ___ seconds
→ Convert minutes to seconds: 3 × 60 = 180 seconds
→ Add extra 45 seconds: 180 + 45 =
225 seconds
✔ Check: 3×60=180, +45=225 → Correct
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Problem 11: 20 days 21 hours = ___ hours
→ Convert days to hours: 20 × 24 = 480 hours
→ Add extra 21 hours: 480 + 21 =
501 hours
✔ Check: 20×24=480, +21=501 → Correct
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Problem 12: 12 hours 5 minutes = ___ minutes
→ Convert hours to minutes: 12 × 60 = 720 minutes
→ Add extra 5 minutes: 720 + 5 =
725 minutes
✔ Check: 12×60=720, +5=725 → Correct
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Final Answer:
570, 465, 236, 627, 331, 365, 630, 375, 116, 225, 501, 725
Parent Tip: Review the logic above to help your child master the concept of time conversion worksheet grade.
