Réponses

2013-09-18T18:22:07+02:00
Exercice 1:

A= -11+4+17-9-1
A= -7+8-1
A= 1-1
A= 0

B= (+6)+(-7)-(-4)-(+3)+(+2)-(+8)
B= (-1)-(-7)+(-6)
B= 6+(-6)
B= 0

C= 1,4-3,7-12,25+0,6+1,3-7,75
C= -2,3-12,85+(-6,45)
C= -15,15+(-6,45)
C= -21,6

D= (+1,5)-(+36,4)-(-8,99)+(-1,5)-(-6,4)-(+0,01)
D= (-31,9)-(-10,49)-(-6,41)
D= (-24,41)-(-6,41)
D= -18

Exercice 2:

E= 38-[72-3x(7+13)]
E= 38-[72-3x(20)]
E= 38-[72-(60)]
E= 38-[12]
E= 26

F= 8+63/7x3-3x4
F= 8+9x3-3x4
F= 8+27-12
F= 35-12
F= 23