Time conversion-between-hours-minutes-and-seconds-grade-4-maths ... - Free Printable

To solve these problems, we need to use two simple conversion rules:
1. Hours to Minutes: There are 60 minutes in 1 hour. So, multiply the number of hours by 60.
2. Minutes to Seconds: There are 60 seconds in 1 minute. So, multiply the number of minutes by 60.

Here is the step-by-step calculation for each question:

Convert the following into minutes:

1) $3 \text{ hours} \times 60 = 180 \text{ minutes}$
2) $5 \text{ hours} \times 60 = 300 \text{ minutes}$
3) $3 \text{ hours} \times 60 = 180 \text{ minutes}$
4) $2 \text{ hours} \times 60 = 120 \text{ minutes}$
5) $10 \text{ hours} \times 60 = 600 \text{ minutes}$
6) $1 \text{ hour} \times 60 = 60 \text{ minutes}$
7) $12 \text{ hours} \times 60 = 720 \text{ minutes}$
8) $7 \text{ hours} \times 60 = 420 \text{ minutes}$
9) $6 \text{ hours} \times 60 = 360 \text{ minutes}$
10) $15 \text{ hours} \times 60 = 900 \text{ minutes}$

Convert the following into seconds:

11) $3 \text{ minutes} \times 60 = 180 \text{ seconds}$
12) $9 \text{ minutes} \times 60 = 540 \text{ seconds}$
13) $10 \text{ minutes} \times 60 = 600 \text{ seconds}$
14) $1 \text{ minute} \times 60 = 60 \text{ seconds}$
15) $11 \text{ minutes} \times 60 = 660 \text{ seconds}$
16) $5 \text{ minutes} \times 60 = 300 \text{ seconds}$
17) $2 \text{ minutes} \times 60 = 120 \text{ seconds}$
18) $8 \text{ minutes} \times 60 = 480 \text{ seconds}$
19) $13 \text{ minutes} \times 60 = 780 \text{ seconds}$
20) $4 \text{ minutes} \times 60 = 240 \text{ seconds}$

Final Answer:
1) 180
2) 300
3) 180
4) 120
5) 600
6) 60
7) 720
8) 420
9) 360
10) 900
11) 180
12) 540
13) 600
14) 60
15) 660
16) 300
17) 120
18) 480
19) 780
20) 240