Arumiaki
Answered

Un tout petit exo de maths rapide pour demain, il faut calculer ces fractions en DETAILLANT les calculs svp !!!

B = 6 - 4 x (1/4 - 1)²
C = 5/14 + 3 x 1/42
D = 1 - 1/3  /  1/4 - 2

Sagot :

droopette
B = 6 - 4 x (1/4 - 1)²
=6-4(1/4-4/4)²
=6-4(-3/4)²
=6-4x(9/16)
=6-36/16
=6-9/4
=24/4-9/4
=15/4

C = 5/14 + 3 x 1/42
=5/14+3/42
=5/14+1/14
=6/14
=3/7

D = 1 - 1/3  /  1/4 - 2
=(3/3-1/3)  /  (1/4-8/4)
=(2/3)/(-7/8)
=2/3 x (-8/7)
=-16/21