Exercices de maths pour lundi (1 et 2) 10POINTS

Exercice - 1 :

a) 1 / 3 + 5 / 9
= 3 / 9 + 5 / 9
= 8 / 9

b) 11 / 6 + ( - 7 / 3 )
= 11 / 6 + ( - 14 / 6 )
= -3 / 6
= - 1 / 2

c) 17 / 24 - ( - 5 / 6 )
= 17 / 24 - ( - 20 / 24 )
= 37 / 24

Exercice - 2 :

a) 2 / 3 + 1 / 8
= 16 / 24 + 3 / 24
= 19 / 24

b) - 2 / 5 + 3 / 4
= - 8 / 20 + 15 / 20
= 7 / 20

c) - 5 / 7 - ( - 3 / 2 )
= - 10 / 14 - ( - 21 / 14 )
= 11 / 14

d) 4 / 7 - 4 / 5
= 20 / 35 - 28 / 35
= - 8 / 35

e) 3 - 5 / 7
= 21 / 7 - 5 / 7
= 16 / 7

f) - 2 - 3 / 4
= - 8 / 4 - 3 / 4
= - 11 / 4