Exercice 1 :
B = (4+3)*5+36/5*(14-5)
B = 7x5 + 7,2*9
B = 35 + 64,8
B = 99,8
C = 20/4*(2+3)-3*(10-2*4)
C = 20/4*5-3*2
C = 5*5-6
C = 25-6
C = 19
D = 74-7*[25-(7-2)*3]
D = 74-7*[25-5*3]
D = 74-7*[25-15]
D = 74-7*10
D = 74-70
D = 4
E = 39+[140-(2*3+4)*2]-3*12/4
E = 39+[150-10*2]-3*12/4
E = 39+[150-20]-3*12/4
E = 39+130-3*12/4
E = 39+130-36/4
E = 39+130-9
E = 160
Exercice 2 :
a. Si a=1, b=2, c=3 et d=4 alors :
(a-b)-(-c+d)
= (1-2)-(-3+4)
= 1-1
= 0
b. Si a=1, b=-3, c=2 et d=-5 alors :
(a-b)-(-c+d)
= (1+3)-(-2-5)
= 4+7
= 11
