Bonsoir,
Calculer A et B et donner chaque résultat sous la forme d'une fraction simplifiée :
A = 7/3 - 2/3 : 8/7
A = 7/3 - 2/3 x 7/8
A = 7/3 - 14/24
A = (7 x 8) / (3 x 8) - 14/24
A = 56/24 - 14/24
A = 42/24
A = (6 x 7) / (6 x 4)
A = 7/4
B = (3/5 - 1/2) x 5/2
B = [(3 x 2) / (5 x 2) - (1 x 5) / (2 x 5)] x 5/2
B = (6/10 - 5/10) x 5/2
B = 1/10 x 5/2
B = 5/20
B = (5 x 1) / (5 x 4)
B = 1/4.
Bonjour
A=7/3-2/3:8/7 = 7/3 -2/3 x 7/8
= 7/3 -14/24
= 7/3 -7/12
= 28/12 -7/12
= 21/12
= 7 /4
et
B=(3/5 - 1/2) x 5/2
= (6/10 -5/10) x 5/2
= 1/10 x 5/2
= 5/20
= 1/4
