Let’s solve each problem one by one using the clues from the chart.
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1. 120 minutes = ______ hours
We know:
60 minutes = 1 hour
So, divide 120 by 60 → 120 ÷ 60 =
2
✔ Answer:
2 hours
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2. 2 decades = ______ years
We know:
10 years = 1 decade
So, 2 × 10 =
20
✔ Answer:
20 years
---
3. 2 years = ______ weeks
We know:
52 weeks = 1 year
So, 2 × 52 =
104
✔ Answer:
104 weeks
*(Note: We use 52 weeks per year as given in the chart — even though a real year is about 52.14 weeks, we follow the chart.)*
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4. 48 hours = ______ days
We know:
24 hours = 1 day
So, 48 ÷ 24 =
2
✔ Answer:
2 days
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5. 90 seconds = ______ minutes
We know:
60 seconds = 1 minute
So, 90 ÷ 60 = 1.5 (or 1 and a half)
✔ Answer:
1.5 minutes
*(You can also write it as “1½” if your teacher allows fractions.)*
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6. 3 weeks = ______ days
We know:
7 days = 1 week
So, 3 × 7 =
21
✔ Answer:
21 days
---
7. 2 fortnights = ______ weeks
We know:
2 weeks = 1 fortnight
So, 2 × 2 =
4
✔ Answer:
4 weeks
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8. 80 years = ______ decades
We know:
10 years = 1 decade
So, 80 ÷ 10 =
8
✔ Answer:
8 decades
---
9. 4 centuries = ______ years
We know:
100 years = 1 century
So, 4 × 100 =
400
✔ Answer:
400 years
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Final Answer:
120 minutes =
2 hours
2 decades =
20 years
2 years =
104 weeks
48 hours =
2 days
90 seconds =
1.5 minutes
3 weeks =
21 days
2 fortnights =
4 weeks
80 years =
8 decades
4 centuries =
400 years
Parent Tip: Review the logic above to help your child master the concept of units of time worksheet grade 3.
