Sagot :
bonjour
4 203 = 1 x 3 600 + 603
603 = 10 x 60 + 3
4 203 s = 1 h 10 min 3 s
5 400.3 min
5 400 = 90 x 60
90 = 1 x 60+ 30
4 400.3 min = 3 j 18 h 18 s
8.42 h = 8 h + 0.42 * 60 = 8 h 25 min 12 s
7.18 h = 7 h 10 min 48 s
Bonjour,
a) 4 203 s = (4 203 ÷ 60) mn
= 70,05 mn
= 1 h + 10 mn + 0,05 mn
= 1 h + 10 mn + (0,05 × 60) s
= 1 h 10 mn 3 s
b) 5 400,3 mn = (5400 ÷ 60) h + 0,3 mn
= 90 h + (0,3 × 60) s
= 90 h 18 s
c) 8,42 h = 8 h + (0,42 × 60) mn
= 8 h + 25,2 m
= 8 h + 25 mn + (0,2 × 60) s
= 8 h 25 mn 12 s
d) 7,18 h = 7 h + (0,18 × 60) mn
= 7 h + 10,8 mn
= 7 h + 10 mn + (0,8 × 60) s
= 7 h 10 mn 48 s