1.(-2 3/4)+(+12 5/7)+(-4.125)+(+0.75)+(+1/8);2.(-8 3/7)+(-7.5)+(-21 4/7)+(+3 1/2)3.(-2 1/2)+(+5/6)+(-0.5)+(+1 1/6);4.(-1)+2+(-3)+4+(-5)+6+...+(-99)+100;
问题描述:
1.(-2 3/4)+(+12 5/7)+(-4.125)+(+0.75)+(+1/8);
2.(-8 3/7)+(-7.5)+(-21 4/7)+(+3 1/2)
3.(-2 1/2)+(+5/6)+(-0.5)+(+1 1/6);
4.(-1)+2+(-3)+4+(-5)+6+...+(-99)+100;
答