Réponse :
bonjour
A=7/6-1/2x3/5 = 7/6 - 3 /10 = 35/30 - 9 /30 = 26 / 30 = 13 /15
B=(1/6-1/4)÷-5/4 =( 2 /12 - 3 /12 ) x - 4 / 5 = - 1/12 x - 4 /5 = 4/60 = 1 /15
C=2/7-3/7x14/9 = 3/7 - 42 / 63 = 27/63 - 42/63 = - 15/63 = - 5 /21
D=-7/8x(2/3-1) = 7 /8 * ( 2/3 - 3 /3) = 7/8 * - 1 /3 = - 7/24
E=4/5x1/4+2/5 = 4/20 + 2 /5 = 4 /20 + 8/20 = 12 /20 = 3 /5
F=-2/5÷3/15+2/15 = - 2/5 x 15/3 + 2/15 = - 30/15 + 2/15 = - 28/15
G=9/2-5/2÷15/8 = 9/2 - 5 /2 x 8/15 = 9/2 - 40/ 30 = 9/2 - 4 /3 = 27/6 - 8/6
= 19/6
Explications étape par étape
