Sagot :
Bonsoir,
a) (+9)-(+12) = 9 - 12 = - 3
b) (-10)-(+6) = - 10 - 6 = - 16
c) (-2)-(-17) = - 2 + 17 = 15
d) (-13)-(-5) = - 13 + 5 = - 8
e) (+8)-(-1) = 8 + 1 = 9
f) 0-(-72) = 0 + 72 = 72.
A=(+9)-(+12)
=+9-12
=-3
B=(-10)-(+6)
=-10-6
=-16
C=(-2)-(-17)
=-2+17
=15
D=(-13)-(-5)
=-13+5
=-8
E=(+8)-(-1)
=8+1
=9
F=0-(-72)
=0+72
=72