Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 12 h = ____ min
- 14 min = _____ s
- 21112 h = _____ min
- 112 min = _____ s
(a)
1 h = 60 min
12 h =
12 x 60 = 30 min
(b)
1 min = 60 s
14 min =
14 x 60 = 15 s
(c)
1 h = 60 min
2
1112 h
= (2 x 60) + (
1112 x 60)
= 120 + 55
= 175 min
(d)
1 min = 60 s
1
12 min
= (1 x 60) + (
12 x 60)
= 60 + 30
= 90 s
Answer(s): 30, 15, 175, 90