Réponses

2014-03-24T21:16:20+01:00
A= 5/2 - 3/4 x 2/5
A= 5/2 - 6/20
A= 5x10 / 2x10 - 6/20
A= 50/20 - 6/20
A= 44/20
A= 11/5

B= (7/5 - 2/3) / (2 - 1/3)
B= (7x3 / 5x3 - 2x5 / 3x5) / (2x3 / 1x3 - 1/3)
B= (21/15 - 10/15) / (6/3 - 1/3)
B= 11/15 / 5/3
B= 11/15 x 3/5
B= 33/75
B= 11/25
2014-03-24T21:22:46+01:00
A=5/2-3/4x2/5
a=5/2-6/20
a=5/2-3/10
a=5x5/5x2-3/10
a=25/10-3/10
a=22/10

b=(7/5-2/3)/(2-1/3)
b=14/5-7/15-4/3+2/9
b=14x3/5x3-7/15-4x5/3x5+2/9
b=42/15-7/15-20/15+2/9
b=15/15+2/9
b=1+2/9
b=9/9+2/9
b=11/9