Exercie 78 :
a)
A = 2 / ( 1/2 ) ( Diviser par un nombre c'est multiplier par son inverse donc )
A = 2 * ( 2/1 )
A = 4/1
A = 4
B = 3 / ( 1/3 )
B = 3 * 3/1
B = 9
C = 4 / ( 1/4 )
C = 4 * 4/1
C = 16
b)
D = 5 / ( 1/5 )
D = 5 * ( 5/1 )
D = 25
E = 6 / ( 1/6 )
E = 6 * 6/1
E = 36
F = 7 / ( 1/7 )
F = 7 * 7/1
F = 49
c)
10 / ( 1/10 ) = 10 * 10/1 = 100
Exercice 80 :
A = 7/2 - 3/4
A = 14/4 - 3/4
A = 11/4
A = 2,75
B = 4/7 + 2
B = 4/7 + 14/7
B = 18/7
B = 2,57
C = 11/4 + 7/18
C = 99/36 + 14/36
C = 113/36
C = 3,14
D = 24/36 * 9/27
D = 216/972
D = 9/2
D = 0,22
