Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 2 min 29 s = _____ s
- 2 h 5 min = _____ min
- 220 s = 3 min _____ s
- 487 min = _____ h 7 min
(a)
1 min = 60 s
2 min 29 s
= 2 x 60 + 29
= 120 + 29
= 149 s
(b)
1 h = 60 min
2 h 5 min
= 2 x 60 + 5
= 120 + 5
= 125 min
(c)
60 s = 1 min
180 s = 180 ÷ 60 = 3 min
220 s
= 180 + 40
= 3 min 40 s
(d)
60 min = 1 h
480 min = 480 ÷ 60 = 8 h
487 min
= 480 + 7
= 8 h 7 min
Answer(s): 149, 125, 40, 8