Question

Questões extras.
01. Sendo A = (-7-5) + ( + 3) - 20, e B = (20 + 4 + 3) - (+2), calcule:
a) A +B=
b) A-B=
c) A+B=​

Answer 1

Resposta:

a)A+B=

[(-7-5)+(+3)]+[(20+4+3)-(+2)]=

[-12+3]+[27-2]=

-9+25=

+16

b)A-B=

[(-7-5)+(+3)]-[(20+4+3)-(+2)]=

[-12+3]-[27-2]=

-9-25=

-34

c)A÷B=

[(-7-5)+(+3)]÷[(20+4+3)-(+2)]=

[-12+3]÷[27-2]=

-9÷25=

-0,36