Question

Efetue as calculas:
$( + 16) + ( + 31) =$
$( - 12) + ( + 20 =$
$( + 26) + ( - 15) =$
$( + 9) + ( - 11) =$
$( - 36) + ( + 25) =$
$( + 9) + ( - 28) =$
​

Answer 1

Resposta:

a) (+16)+(+31)= +16+31= +47

b) (-12)+(+20)= -12+20= +6

c) (+26)+(-15)= +26-15= +11

d) (+9)+(-11)= +9-11= -2

e) (-36)+(+25)= -36+25= -11

f) (+9)+(-28)= +9-28= -19