Question

Calcule as operações (-5)+(-7) e -3+8-7 e (+8)-(-3) e (+16)-8+18.

Answer 1

(-5)+(-7)= -5-7=-12

-3+8-7= 5-7=-2

(+8)-(-3)=+8+3=11

(+16)-8+18=16-8+18=8+18=26

Answer 2

= (- 5) + (-7)  = - 5 - 7 = - 12

- 3 + 8 - 7  = - 3 + 1 = - 2

(+8) - (- 3) = 8 + 3 = 11

(+16) - 8 + 18 = 16 - 8 + 18 = 8 + 18 = 26