Question

calcule x-y:

a)x= + 9 e y = + 7

b)x = - 35 e y = - 13

c)x = + 900 e y = - 460

d)x = - 120 e y = + 600

e)x = + 190 e y = - 800

Answer 1

a)9-7= 2
b)-35-(-13)= -35+13= -22
c)900-(-460)= 900+460= 1360
d)-120-(+600)= -720
e)190-(-800)=990