Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 min 19 s = _____ s
- 4 h 25 min = _____ min
- 140 s = 2 min _____ s
- 187 min = _____ h 7 min
(a)
1 min = 60 s
7 min 19 s
= 7 x 60 + 19
= 420 + 19
= 439 s
(b)
1 h = 60 min
4 h 25 min
= 4 x 60 + 25
= 240 + 25
= 265 min
(c)
60 s = 1 min
120 s = 120 ÷ 60 = 2 min
140 s
= 120 + 20
= 2 min 20 s
(d)
60 min = 1 h
180 min = 180 ÷ 60 = 3 h
187 min
= 180 + 7
= 3 h 7 min
Answer(s): 439, 265, 20, 3