Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 7 min 24 s = _____ s
- 4 h 25 min = _____ min
- 245 s = 4 min _____ s
- 307 min = _____ h 7 min
(a)
1 min = 60 s
7 min 24 s
= 7 x 60 + 24
= 420 + 24
= 444 s
(b)
1 h = 60 min
4 h 25 min
= 4 x 60 + 25
= 240 + 25
= 265 min
(c)
60 s = 1 min
240 s = 240 ÷ 60 = 4 min
245 s
= 240 + 5
= 4 min 5 s
(d)
60 min = 1 h
300 min = 300 ÷ 60 = 5 h
307 min
= 300 + 7
= 5 h 7 min
Answer(s): 444, 265, 5, 5