Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 min 40 s = _____ s
- 2 h 25 min = _____ min
- 150 s = 2 min _____ s
- 492 min = _____ h 12 min
(a)
1 min = 60 s
7 min 40 s
= 7 x 60 + 40
= 420 + 40
= 460 s
(b)
1 h = 60 min
2 h 25 min
= 2 x 60 + 25
= 120 + 25
= 145 min
(c)
60 s = 1 min
120 s = 120 ÷ 60 = 2 min
150 s
= 120 + 30
= 2 min 30 s
(d)
60 min = 1 h
480 min = 480 ÷ 60 = 8 h
492 min
= 480 + 12
= 8 h 12 min
Answer(s): 460, 145, 30, 8