1 2 4 4 1 )
1 2 4 4 1 )
4( )2( )1=4( )2( )1
-1,2,0,4,4,12,( )
(-3/4)+1/2;
1/2-(3/4-3/8), 1/2+1/4-1/6 , 2/3+(1/2+1/4),
1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),
一道奥数题,急救!(1+1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/
1,1,2,3,3,4,4,7,( ),( )
200*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/100)
(-1/2)-(-1/3)-(+1/4)
1,2,4,7,(),(),().
1/2,1/4,