Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 4 min 40 s = _____ s
- 3 h 10 min = _____ min
- 185 s = 3 min _____ s
- 560 min = _____ h 20 min
(a)
1 min = 60 s
4 min 40 s
= 4 x 60 + 40
= 240 + 40
= 280 s
(b)
1 h = 60 min
3 h 10 min
= 3 x 60 + 10
= 180 + 10
= 190 min
(c)
60 s = 1 min
180 s = 180 ÷ 60 = 3 min
185 s
= 180 + 5
= 3 min 5 s
(d)
60 min = 1 h
540 min = 540 ÷ 60 = 9 h
560 min
= 540 + 20
= 9 h 20 min
Answer(s): 280, 190, 5, 9