Réponse :
bonjour
Explications étape par étape
G= 3+ (-7)/5 - 17/20
3-7/5=15/5-7/5=8/5
8/5-17/20=(8x4)/5x4)-17/20=32/20-17/20=15/20=(5x3)/(5x4)=3/4
H= -4+16/3 - (-11)/12
-4+16/3=-12/3+16/3=4/3
4/3+11/12=(4x4)/(4x3)+11/12=16/12+11/12=27/12=(9x3)/(4x3)=9/4
I= 5/6 -5/8 -5/34
5/6-5/8=(5x4)/(6x4)-(5x3)/(8x3)=20/24-15/24=5/24
5/24-5/34=(5x34)/(24x34)-(5x24)/(34x24)=170/816-120/816=50/816=(50÷2)/(816÷2)=25/408
J= 3- (5/7-9/14)
5/7-9/14=(5x2)/(7x2)-9/14=10/14-9/14=1/14
3-1/14=42/14-1/14=41/14
