Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 1 min 40 s = _____ s
- 2 h 15 min = _____ min
- 320 s = 5 min _____ s
- 188 min = _____ h 8 min
(a)
1 min = 60 s
1 min 40 s
= 1 x 60 + 40
= 60 + 40
= 100 s
(b)
1 h = 60 min
2 h 15 min
= 2 x 60 + 15
= 120 + 15
= 135 min
(c)
60 s = 1 min
300 s = 300 ÷ 60 = 5 min
320 s
= 300 + 20
= 5 min 20 s
(d)
60 min = 1 h
180 min = 180 ÷ 60 = 3 h
188 min
= 180 + 8
= 3 h 8 min
Answer(s): 100, 135, 20, 3