Bonjour
A = 2 - 5/4 x 1/10
A = 2 - 5/40
A = (2 x 40) / (1 x 40) - 5/40
A = 80/40 - 5/40
A = 75/40
A = (5 x 15) / (5 x 8)
A = 15/8
B = 3/5 - 2/5 : 3/10
B = 3/5 - 2/5 x 10/3
B = 3/5 - 20/15
B = (3 x 3) / (5 x 3) - 20/15
B = 9/15 - 20/15
B = - 11/15.
Réponse :
A = 2-5/40
A= 2 - 1/8
A=(16-1)/8=15/8
B=3/5 - 2/5*10/3
B=3/5 - 20/15
B=(9-20)/15=-11/15
Explications étape par étape
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Bonjour
A = 2 - 5/4 x 1/10
A = 2 - 5/40
A = (2 x 40) / (1 x 40) - 5/40
A = 80/40 - 5/40
A = 75/40
A = (5 x 15) / (5 x 8)
A = 15/8
B = 3/5 - 2/5 : 3/10
B = 3/5 - 2/5 x 10/3
B = 3/5 - 20/15
B = (3 x 3) / (5 x 3) - 20/15
B = 9/15 - 20/15
B = - 11/15.
Réponse :
A = 2-5/40
A= 2 - 1/8
A=(16-1)/8=15/8
B=3/5 - 2/5*10/3
B=3/5 - 20/15
B=(9-20)/15=-11/15
Explications étape par étape