Ex 14 :
A= 1/12 + 1/8
A= 1x2/12x2 + 1x3/8x3
A= 2/24 + 3/24
A= 5/24
B= 1/12 + -1/8
B= 1x2/12x2 + -1x3/8x3
B= 2/24 + -3/24
B= -1/24
C= -1/12 + 1/8
C= -1x2/12x2 + 1x3/8x3
C= -2/24 + 3/24
C= 1/24
D= -1/12 + -1/8
D= -1x2/12x2 + -1x3/8x3
D= -2/24 + -3/24
D= -5/24
Ex 15 :
a) La variable n vaut 1/3 au début de programme
b) 1/3 x 5 = 5/3
5/3 + -2/7 = 5x7/3x7 + -2x3/7x3
= 15/21 + -6/21
= 9/21 = 3/7
La variable n vaut 3/7 à la fin du programme.
