Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 min 38 s = _____ s
- 4 h 15 min = _____ min
- 215 s = 3 min _____ s
- 371 min = _____ h 11 min
(a)
1 min = 60 s
2 min 38 s
= 2 x 60 + 38
= 120 + 38
= 158 s
(b)
1 h = 60 min
4 h 15 min
= 4 x 60 + 15
= 240 + 15
= 255 min
(c)
60 s = 1 min
180 s = 180 ÷ 60 = 3 min
215 s
= 180 + 35
= 3 min 35 s
(d)
60 min = 1 h
360 min = 360 ÷ 60 = 6 h
371 min
= 360 + 11
= 6 h 11 min
Answer(s): 158, 255, 35, 6