Bonjour,
2)
A = 0,5/5 = (0,5x 9) / (5 x 9) = 4,5/45
B = 0,1/9 = (0,1 x 5) / (9 x 5) = 0,5/45
Donc : A > B
3)
A = 2/3 = (2 x 7) / (3 x 7) = 14/21
B = 5/21
Donc : A > B
4)
a) A = 3/4 = 0,75
B = 0,07/0,1 = (0,07 x 100) / (0,1 x 100) = 7/10 = 0,7
Donc : A > B
b) A = 18/80 = 18 : 80 = 0,225
B = 41,7/185 = 41,7 : 185 ≈ 0,2254....
Donc : A < B
5)
13/12
7/6 = (7 x 2) / (6 x 2) = 14/12
4/3 = (4 x 4) / (3 x 4) = 16/12
3/2 = (3 x 6) / (2 x 6) = 18/12
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12/1213/1214/12 16/12 18/12
