Réponses

2013-10-25T09:45:13+02:00
Bonjour

A    :    8*(-4)+14:(-7) =  -32 + (-2) = -32 -2 = -34

 B    :   35:5-(16-20):(-2) =  7 - (-4 : -2) = 7 - 2 = 5

 C    :   -48:16-6*(-5)+18 =
-3 - (-30) +18 = -3 +30 +18 = +48 -3 = 45


2013-10-25T10:04:07+02:00
A = 8 * ( -4 ) + 14 : ( -7 )
= -32 - 2
= -34

= 35 : 5 - ( 16 - 20 ) : ( -2 )
= 7 + 4 : (-2)
= 7 - 2
= 5

= -48 : 16 - 6 * ( -5 ) + 18
= -3 + 30 + 18
= 27 + 18
= 45