Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 18 20 to 21 20 = _____ h
- 3:15 p.m. to 7:15 p.m. = _____ h
- 04 00 to 07 12 = _____ min
- 1:12 a.m. to 5:45 a.m. = _____ min
(a)
From 18 20 to 21 20 = 3 h
(b)
From 3:15 p.m. to 7:15 p.m. = 4 h
(c)
From 04 00 to 07 00 = 3 h
From 07 00 to 07 12 = 12 min
From 04 00 to 07 12 = 3 h 12 min
1 h = 60 min
3 h = 3 x 60 = 180 min
3 h 12 min = 180 + 12 = 192 min
(d)
From 1:12 a.m. to 5:12 a.m. = 4 h
From 5:12 a.m. to 5:45 a.m. = 33 min
From 1:12 a.m. to 5:45 a.m. = 4 h 33 min
1 h = 60 min
4 h = 4 x 60 = 240 min
4 h 33 min = 240 + 33 = 273 min
Answer(s): 3, 4, 192, 273