Bonjour,
On considère les nombres suivants :
a: Ecrire A et B sous forme de fractions irréductibles
A = 14 / 45 x 27/49
A = 378/2 205
A = (63 x 6) / (63 x 35)
A = 6/35
B = (2/3 x 3/2) : 7/11
B = 6/6 : 7/11
B = 1 x 11/7
B = 11/7
C= 3 - 5 x 1/10 + 4 x 1/100
C = 3 - 5/10 + 4/100
C = (3 x 100) / (1 x 100) + (5 x 10) / (10 x 10) + 4/100
C = 300/100 + 50/100 + 4/100
C = 354/100
C = (2 x 177) / (2 x 50)
C = 177/50
b: Ecrire C sous forme décimale :
A = 6/35
A = 0,17142857
B = 11/7
B = 1,57142857
C = 177/50
C = 3,54
