Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 12 h = ____ min
- 512 min = _____ s
- 356 h = _____ min
- 223 min = _____ s
(a)
1 h = 60 min
12 h =
12 x 60 = 30 min
(b)
1 min = 60 s
512 min =
512 x 60 = 25 s
(c)
1 h = 60 min
3
56 h
= (3 x 60) + (
56 x 60)
= 180 + 50
= 230 min
(d)
1 min = 60 s
2
23 min
= (2 x 60) + (
23 x 60)
= 120 + 40
= 160 s
Answer(s): 30, 25, 230, 160