QUI ET LE PLUS FORT EN MATH AIDEZ MOI SVPP !!! 43 et 44

Exercice - 43 :

a = 5 x ( 1 / 2 + 3 / 4 )
= 5 x ( 2 / 4 + 3 / 4 )
= 5 x 5 / 4
= 25 / 4

b = 7 / 2 x ( 3 / 5 + 1 / 10 )
= 7 / 2 x ( 6 / 10 + 1 / 10 )
= 7 / 2 x 7 / 10
= 49 / 20

c = 2 / 3 + 4 / 3 x 6
= 2 / 3 + 8
= 26 / 3

d = 7 / 8 + 24 x 5 / 16
= 7 / 8 + 15 / 2
= 7 / 8 + 60 / 8
= 67 / 8

Exercice - 44 :

a = 13 / 12 - 3 / 2 x 1 / 3
= 13 / 12 - 3 / 6
= 13 / 12 - 6 / 12
= 7 / 12

b = 2 / 9 + 7 / 9 x 11 / 2
= 2 / 9 + 77 / 18
= 4 / 18 + 77 / 18
= 81 / 18
= 9 / 2

c = 8 - 5 x 3 / 7
= 8 - 15 / 7
= 41 / 7

d = 11 / 12 x 4 - 4 x 2 / 3
= 11 / 3 - 8 / 3
= 3 / 3 ou 1