We will learn how to multiplication and division of units of time.
1. Multiply 9 hours 10 minutes by 6
Solution:
First multiply minutes 10 × 6 = 60 minutes = 1 hour We carry 1 hour to hour column and write 0 in minutes column. Now, multiply hours, 9 × 6 + 1 = 55 Write 55 in hours column. |
Therefore, 6 × (9 hours 10 minutes) = 55 hours
2. Divide 8 hours 20 minutes by 5
Solution:
We convert 8 hours 20 minutes to minutes and then divide.
8 hours 20 minutes = 500 minutes
100 minutes = 1 hour 30 minutes
Therefore, (8 hours 20 minutes) ÷ 5 = 1 hour 30 minutes
Questions and Answers on Multiplication and Division of Time:
1. Multiply
(i) 14 minutes 10 seconds by 6
(ii) 6 hours 23 minutes by 25
(iii) 32 days 16 hours by 25
(iv) 6 years 11 months by 40
(v) 5 weeks 2 days by 15
Answers:
1. (i) 85 minutes
(ii) 70 hours 30 minutes
(iii) 66 days 16 hours
(iv) 276 years 8 months
(v) 79 weeks 2 days
2. Divide:
(i) 8 minutes 3 seconds by 3
(ii) 4 hours 8 minutes by 8
(iii) 5 months 6 days by 6
(iv) 1 year 5 days by 5
(v) 21 weeks 3 days by 3
Answers
2. (i) 2 minutes 41 seconds
(ii) 31 minutes
(iii) 26 days
(iv) 74 days
(v) 7 weeks 1 day
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