# Multiplication and Division of Time

We will learn how to multiplication and division of units of time.

1. Multiply 9 hours 10 minutes by 6

Solution:

 First multiply minutes10 × 6 = 60 minutes = 1 hourWe carry 1 hour to hour column and write 0 in minutes column.Now, multiply hours, 9 × 6 + 1 = 55Write 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

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

2. (i) 2 minutes 41 seconds

(ii) 31 minutes

(iii) 26 days

(iv) 74 days

(v) 7 weeks 1 day

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