1/2+1/4+3/4+1/6+3/6+5/6.2009/2010
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1、2、2、4、3、6、4、( )、(
1+2+3/6+1/4=
1+1 1+3 6-3 4-2
2/1:3/1:4/1:6/1怎么得出等于6:4:3:2
简算:24×(1/2+1/3-1/4-1/6)
(1/2+1/3+1/4+1/6)*24
1,2,2,3,4,6,( )
(6)2(1)(2)(3)(4)
简算:1/1*2+1/2*3+1/3*4+1/4*5+1/5*6
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),
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),
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),
1/1*3+1/2*4+1/3*5+1/4*6+.+1/100*102=?
(-2/3)+(-1/6)+1/4-1/2
习题2.8 -2/3+(-1/6)-(-1/4)-1/2
-1/2+(-1/6)-(-1/4)-2/3
1+2+3+1+2+3-4+5+6
1+2+3+4+5+6+78