Question

1.(+12)+(-14)+(-62)+(-25);

Answer 1

1、原式=12-14-62-25=-89

2、原式=（5-3-6-15）+（5/6-1/7-1/6-6/7）=-19+2/3-1=-19又1/3

3、原式=-8.62+3.29-6.38-7.29=-19

4、原式=5.3-2.2-6+2.7-9.8=-10