Bonsoir,
a)
14/25 * 5/7 = 70/175 = 14/35= 2/5
b)
5/6 + 3/7 * - 7/3
=5/6 - 21/21
= 5/6 -1
= 5/6 - 6/6 = -1/6
c)
(1/6 + 1/3) ( 5/8 -1/4)
= (1/6 + 2/6) ( 5/8 -2/8)
= 3/6 * 3/8
= 1/3 * 3/8
= 3/24 = 1/8
d)
(737*-521)/ -3,1
= - 383 977/-3,1 = 123 863, 5 484
bonsoir
A = 14/25 x 5/7
A = 2/5 x 1 = 2/5
B = 5/6 + ( - 21/21 )
b = 5/6 - 1 = - 1 /6
C = ( 1/6 + 1/3 ) x (5/8 - 1 /4 )
= ( 1/6 + 2/6 ) x ( 5/8 - 2/8 )
= 3/6 x 3/8 = 9/48 = 3/16
D = (737 x - 521 ) : - 3.1 = - 383977/ - 3.1 = 3839770 /31
