Effectuer:
A=2/3x(7/5x2/5)
B=(7/4-3/4)x(7/5-2/5)
C= 17/14-3/2x5/7
D=(7/12+1/6)x3/2
G=4/5-1/3x2/15+4/45
H=2/5x13/7-2/5x1/7
I=3/10x1/4+7/5x3/2
A=2/3x(7/5x2/5)
B=(7/4-3/4)x(7/5-2/5)
C= 17/14-3/2x5/7
D=(7/12+1/6)x3/2
G=4/5-1/3x2/15+4/45
H=2/5x13/7-2/5x1/7
I=3/10x1/4+7/5x3/2
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BONJOUR ;
A = 2/3 x (7/5 x 2/5)
= 2/3 x 14/25
= 28/75
B = (7/4 - 3/4) x (7/5 - 2/5)
= 1 x 1
= 1
C = 17/14 - 3/2 x 5/7
= 17/14 - 15/14
= 2/14 = 1/7
D = (7/12 + 1/6) x 3/2
= (7/12 + 2/12) x 3/2
= 9/12 x 3/2
= 27/24 = 9/8
G = 4/5 - 1/3 x 2/15 + 4/45
= 36/45 - 2/45 + 4/45
= 38/45
H = 2/5 x 13/7 - 2/5 x 1/7
= 26/35 - 2/35
= 24/35
I = 3/10 x 1/4 + 7/5 x 3/2
= 3/40 + 21/10
= 3/40 + 84/40
= 87/40