(-1)+2+(-3)+(+4)+……+(-99)+100 2提(-3.125)+(-4.75)+4又+3/4+3又1/8
问题描述:
(-1)+2+(-3)+(+4)+……+(-99)+100 2提(-3.125)+(-4.75)+4又+3/4+3又1/8
3提3.8+(-8.4) 4提2/5+(-3/5) 5提3又1/4+(-1又1/2)6提(-3又1/3)+(-4又1/2)+2又1/2+(-4又2/3)
答
(-1)+2+(-3)+(+4)+……+(-99)+100 =2-1+4-3+.+100-99=1+1+.+1=50(-3.125)+(-4.75)+4又3/4+3又1/8=(3.125-3.125)+(4.75-7.75)=0+0=03.8+(-8.4) =3.8-8.4=-4.62/5+(-3/5) =2/5-3/5=-1/53又1/4+(-1又1/2)=3.25...