-7+6+9-8-5=?-1/3+1/2+1/4-2/3-3/4=?
问题描述:
-7+6+9-8-5=?-1/3+1/2+1/4-2/3-3/4=?
123.75-1又3/4-29又2/5-3又3/5+112又1/3=?
答
-7+6+9-8-5=(-7+6)+(9-8)-5=-1+1-5=-5-1/3+1/2+1/4-2/3-3/4= (-1/3-2/3)+1/2+(1/4-3/4)=-1+1/2-1/2=-1123.75-1又3/4-29又2/5-3又3/5+112又1/3=123.75-1.75-(29又2/5+3又3/5)+112又1/3=122-33+112又1/3=89+1...