Question

1)-12+(+15)+(-6)+(+12); 2)(-13)+(-15)+(+9)+(-17); 3) (-4,7) + (+0,6) + (-0,9) + (+1,8); 4)(-3/...​

Answer 1

Ответ:

$1) - 12 + 15 - 6 + 12 = 9 \\ 2) - 13 - 15 + 9 - 17 = - 36 \\ 3) - 4.7 + 0.6 - 0.9 + 1.8 = - 3.2$