Calculer les expressions suivantes I= 6/35-2/7x1/2 J= 1-4/9: -4/9 K= 7/18 x 2/7- (5/3-1) au carré + 1 L= (-7/5+4/3):(7-4/3) merciii !

I= 6/35 -2/7 X 1/2
I = 6/35 -2/14
I = 84/490 -70/490 = 24/490 = 12/245
J= 1-4/9 :-4/9
J= 1 -4/9 X 9/-4
J = 1 -36/36
J = 0

K= 7/18 x 2/7- (5/3-1)² + 1
K = 14/126 -(5/3 -3/3)² +1
K = 14/126 -(2/3)² +1
K = 14/126 -4/9 +1
14/126 -56/126 + 126/126
140/126 -56/126 = 84/126 = 28/42 = 4/14= 2/7

L= (-7/5+4/3):(7-4/3)
L = (-21/15 +20/15) : (21/3 -4/3)
L = -1/15 : 17/3
L = -1/15 X 3/17
L = -3/255 = -1/85