Bonjour,
Calculer sous forme fractionnaire en détaillant les étapes simplifier le résultat si possible
A=-4/7 : (5/14+5/6)
A = 4/7 : [(5 x 3) / (14 x 3) + (5 x 7) / (6 x 7)]
A = 4/7 : (15/42 + 35/42)
A = 4/7 : 50/42
A = 4/7 x 42/50
A = 168/350
A = (14 x 12) / (14 x 25)
A = 12/25.
B= (1/8+7/12) / (5/6-4/15)
B = [(1 x 3) / (8 x 3) + (7 x 2) / (12 x 2)] / [(5 x 5) / (6 x 5) - (4 x 2) / (15 x 2)]
B = (3/24 + 14/24) : (25/30 - 8/30)
B = 17/24 : 17/30
B = 17/24 x 30/17
B = 510/408
B = (102 x 5) / (102 x 4)
B = 5/4.
c=(5/3-7/9) / (1/4-1/2)
C = [(5 x 3) / (3 x 3) - 7/9] : [1/4 - (1 x 2) / (2 x 2)]
C = (15/9 - 7/9) : (1/4 - 2/4)
C = 8/9 : - 1/4
C = 8/9 x - 4
C = - 32/9
D= 1/5 : (6-4/15)
D = 1/5 : [6 x 15) / (1 x 15) - 4/15]
D = 1/5 : (90/15 - 4/15)
D = 1/5 : 86/15
D = 1/5 x 15/86
D = 15/430
D = (5 x 3) / (5 x 86)
D = 3/86.