您好: (-3又1/4)-【(-3又1/4)+5又1/3】 =-3又1/4+3又1/4-5又1/3 =-5又1/3 4.4+[(-0.1)+8又1/3+(-11又2/3)]+1又1/3 =4.4-0.1+8又1/3-11又2/3+1又1/3 =4.3+9又2/3-11又2/3 =4.3-2 =2.3 1-2-3+4+5-6-7+8+9-10-11+12+……+2009-2010 =(1-2-3+4)+(。