Problem 1:
Question: Liam usually gets up at 7:35 a.m. Since he was sick, he got up 1 hour and 35 minutes later than usual. What did he get up?
Solution:
1.
Start with Liam's usual wake-up time: 7:35 a.m.
2.
Add the extra time he slept due to being sick: 1 hour and 35 minutes.
- Adding 1 hour to 7:35 a.m. gives 8:35 a.m.
- Adding an additional 35 minutes to 8:35 a.m. gives 9:10 a.m.
Answer: Liam got up at
9:10 a.m.
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Problem 2:
Question: Liam has some painkillers at home for his headache and fever. There are 36 tablets left in the bottle, and he is supposed to take 2 tablets at a time, 4 times a day. How many tablets will be left after one day? How many days before he runs out of tablets?
Solution:
1.
Calculate the number of tablets Liam takes per day:
- He takes 2 tablets at a time.
- He takes them 4 times a day.
- Total tablets per day = \( 2 \times 4 = 8 \) tablets.
2.
Calculate the number of tablets left after one day:
- Initial number of tablets = 36.
- Tablets used in one day = 8.
- Tablets left after one day = \( 36 - 8 = 28 \).
3.
Calculate how many days it will take for him to run out of tablets:
- Total tablets = 36.
- Tablets used per day = 8.
- Number of days before running out = \( \frac{36}{8} = 4.5 \).
- Since Liam cannot use half a day, he will run out after
5 days (on the 5th day, he will not have enough tablets for the full day).
Answers:
- Tablets left after one day:
28 tablets
- Days before running out:
5 days
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Problem 3:
Question: Liam went to the doctor. There are 8 patients waiting. The nurse told him it will be his turn after 2 hours. How many minutes would the doctor use to see each patient?
Solution:
1.
Convert the total waiting time into minutes:
- Liam has to wait 2 hours.
- 1 hour = 60 minutes.
- Total waiting time = \( 2 \times 60 = 120 \) minutes.
2.
Determine the number of patients ahead of Liam:
- There are 8 patients waiting, and Liam is next after 2 hours.
- This means there are 7 patients ahead of Liam (since he is the 8th patient).
3.
Calculate the time spent per patient:
- Total waiting time for 7 patients = 120 minutes.
- Time per patient = \( \frac{120}{7} \approx 17.14 \) minutes.
Answer: The doctor uses approximately
17.14 minutes to see each patient.
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Final Answers:
1. Liam got up at
$\boxed{9:10 \text{ a.m.}}$
2. Tablets left after one day:
$\boxed{28}$, Days before running out:
$\boxed{5}$
3. Time per patient:
$\boxed{17.14 \text{ minutes}}$
Parent Tip: Review the logic above to help your child master the concept of 4th grade problem solving worksheet.
