(1/4 ×6/1+6/1×8/1+8/1×10/1+10/1×12/1)×2这道题怎么简便算?
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(1/4×6/1+6/1×8/1+8/1×10/1+10/1×12/1)×2这道题怎么简便算?(1/4×6/1+6/1×8/1+8/1×10/1+10/1×12/1)×2这道题怎么简便算?(1/4×6
(1/4 ×6/1+6/1×8/1+8/1×10/1+10/1×12/1)×2这道题怎么简便算?
(1/4 ×6/1+6/1×8/1+8/1×10/1+10/1×12/1)×2这道题怎么简便算?
(1/4 ×6/1+6/1×8/1+8/1×10/1+10/1×12/1)×2这道题怎么简便算?
(1/4*1/6+1/6*1/8+1/8*1/10+1/10*1/12)*2
=[(1/4-1/6)*1/2+(1/6-1/8)*1/2+(1/8-1/10)*1/2+(1/10-1/12)*1/2]*2
=[(1/4-1/6)+(1/6-1/8)+(1/8-1/10)+(1/10-1/12)]*2*1/2
=(1/4-1/6)+(1/6-1/8)+(1/8-1/10)+(1/10-1/12)
=1/4-1/12
=3/12-1/12
=2/12
=1/6
1/2+1/4+1/6+1/8+.1/n
|1/4-1/2|+|1/6-1/4|+|1/8-1/6|+```+|1/2008-1/2006|
1/2*4+1/4*6+1/6*8+1/8*10+---+1/198*200
1/2*4*6+1/4*6*8+1/6*8*10+.+96*98*100
1/2*4+1/4*6+1/6*8+1/8*10.1/2006*2008
6 7 8 1
1,20,6,1,8,(),()
8+6-3-1+4+8+9-1-3等于
1+1+1+1+ 1+ 1-4 - 1-0+8×1000÷1×6=?
1/2*4+1/4*6+1/6*8+.+1/2006*2008=(1/2*4)+(1/4*6)+(1/6*8)+..........+(1/2006*2008)
10,1,8,1,6,2,4,6,2,().
2/1+4/1+4/1+6/1+8/1+16/1+32/1=?
计算1/2*4+1/4*6+1/6*8+.+1/2002*2004+1/2004*2006
1+1+2+1+2+6+4+5+8等于
1/5-1/6 7/8-1/4
1+1+2+4+6+8+1等于多少
1/3-1/6+1/4X=7/8
1+1—1×3+2×4+34+6×8