1/2*1/4+1/4*1/6+1/6*1/8.1/2012*1/2014简便方法计算
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1/2*1/4+1/4*1/6+1/6*1/8.1/2012*1/2014简便方法计算1/2*1/4+1/4*1/6+1/6*1/8.1/2012*1/2014简便方法计算1/2*1/4+1/4*1/
1/2*1/4+1/4*1/6+1/6*1/8.1/2012*1/2014简便方法计算
1/2*1/4+1/4*1/6+1/6*1/8.1/2012*1/2014简便方法计算
1/2*1/4+1/4*1/6+1/6*1/8.1/2012*1/2014简便方法计算
=1/2×[(1/2-1/4)+(1/4-1/6)+(1/6-1/8)+……+(1/2012-1/2014)]
=1/2×(1/2-1/2014)
=503/2014
1,2,4,6,
1/2*2-1+1/4*4-1+1/6*6-1+...+1/50*50-1
|1/4-1/2|+|1/6-1/4|+|1/8-1/6|+```+|1/2008-1/2006|
1/2+1/4+1/6+1/8+.1/n
1/2+1/2+4+1/2+4+6+.+1/2+4+6+...+100
1+1/2+4+1/2+4+6+1/2+4+6+8+.+1/2+4+6+8...+20
2/1+4/1+4/1+6/1+8/1+16/1+32/1=?
(1- 1/100)(1- 1/99) .....(1- 1/4)(1- 1/3)(1- 1/2) (-1 1/2)*(-1 1/3)*......(-1 1/6)*(-1 1/7)
(1/4+1/2+1/6)×1/24等于什么?
简算:24×(1/2+1/3-1/4-1/6)
(1/2+1/3+1/4+1/6)*24
(1/4+2/9-1/6)×36
6/7-1/2+1/4简算
1+2+3/6+1/4=
1+2+4+6@$456
1+1+1+1+1+1+1+1+1+2+5+4+8+3+6+2+1+4等于多少?
巧算:(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)=====
1+1+1+1+11+-1-1-1-1-2-3-4-5-6等于