Let's solve each of the
time word problems step by step, showing the number sentence and working for each.
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1. Mario started doing his homework at 17:53 and studied for 82 minutes. At what time did he stop studying?
Step 1: Start time = 17:53
Step 2: Add 82 minutes to 17:53
Break 82 minutes into 60 + 22 minutes:
- 17:53 + 60 minutes = 18:53
- 18:53 + 22 minutes = 19:15
✔ Answer: Mario stopped studying at
19:15
Number sentence:
17:53 + 82 min = 19:15
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2. I usually go to the gym at 11:45 in the morning and finish by 14:20. How long do I usually stay in the gym?
Step 1: From 11:45 to 14:20
Break it down:
- From 11:45 to 12:00 = 15 minutes
- From 12:00 to 14:00 = 2 hours = 120 minutes
- From 14:00 to 14:20 = 20 minutes
Total = 15 + 120 + 20 =
155 minutes
Convert to hours and minutes:
- 155 ÷ 60 = 2 hours and 35 minutes
✔ Answer: I stay in the gym for
2 hours 35 minutes
Number sentence:
14:20 – 11:45 = 2 hours 35 minutes
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3. It takes me 25 seconds to read a page in a book. How many minutes will it take me to read 12 pages?
Step 1: Time for one page = 25 seconds
Step 2: For 12 pages = 12 × 25 = 300 seconds
Step 3: Convert seconds to minutes:
300 ÷ 60 = 5 minutes
✔ Answer: It will take
5 minutes
Number sentence:
12 × 25 = 300 seconds → 300 ÷ 60 = 5 minutes
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4. A football game started at 20:30 pm. The game lasted 90 minutes. At what time did the game finish?
Step 1: Start time = 20:30
Step 2: Add 90 minutes = 1 hour 30 minutes
- 20:30 + 1 hour = 21:30
- 21:30 + 30 minutes = 22:00
✔ Answer: The game finished at
22:00
Number sentence:
20:30 + 90 min = 22:00
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5. We went to bed at 21:20 and woke up at 6:20 the next morning. How long did we sleep?
Step 1: From 21:20 to midnight (24:00) = 2 hours 40 minutes
(24:00 – 21:20 = 2h 40m)
Step 2: From midnight (00:00) to 6:20 = 6 hours 20 minutes
Step 3: Total = 2h 40m + 6h 20m = 9 hours
✔ Answer: We slept for
9 hours
Number sentence:
From 21:20 to 6:20 next day = 9 hours
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6. I can type 20 words in 30 seconds. How long will it take me to type 500 words in minutes?
Step 1: Find typing rate per second or minute
In 30 seconds → 20 words
So in 1 second → 20 ÷ 30 = 2/3 words per second
But better to find how many words per minute:
30 seconds = 0.5 minutes
So in 0.5 minutes → 20 words
Then in 1 minute → 20 ÷ 0.5 = 40 words per minute
Step 2: Time to type 500 words = 500 ÷ 40 = 12.5 minutes
12.5 minutes = 12 minutes and 30 seconds
✔ Answer: It will take
12.5 minutes (or 12 minutes 30 seconds)
Number sentence:
500 ÷ (20 ÷ 0.5) = 500 ÷ 40 = 12.5 minutes
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✔ Final Answers Summary:
1.
19:15
2.
2 hours 35 minutes
3.
5 minutes
4.
22:00
5.
9 hours
6.
12.5 minutes
Let me know if you'd like this formatted as a printable worksheet!
Parent Tip: Review the logic above to help your child master the concept of time worksheet grade 4 word problems.
