Question

resolva as expressão numérica a (+12+10)÷(-20+30)= b (+20-5) ÷(+12-4 = c (+12+5)×(-10+5)-(-1+8)= d(-5+12)÷(-5+4)+(+8-5)×(-1+4)=
só os cálculos por favor ​

Answer 1

Resposta:

a) (+12+10):(-20+30)

(22):(10)

2,2

b) (+20-5):(+12-4)

(15):(8)

1,87500

c) (+12+5)x(-10+5)-(-1+8)

(17)x(-5)-(7)

-85-7

-92

d) (-5+12):(-5+4)+(+8-5)x(-1+4)

(7):(-1)+(3)x(3)

-7+9

2