(1/4+1/6-1/2)×12
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(1/4+1/6-1/2)×12(1/4+1/6-1/2)×12(1/4+1/6-1/2)×12
(1/4+1/6-1/2)×12
(1/4+1/6-1/2)×12
(1/4+1/6-1/2)×12
(1/4+1/6-1/2)×12
(1/4+1/6-1/2)×12
找规律填空:1/12,1/6,1/4,1/3,5/12,1/2,().
-12*(2又1/4-1又1/2+1又1/6-1又1/12)
(1/2+1/4+1/6+1/8)-(1/3+1/6+1/9+1/12)+(1/4+1/8+1/12+1/16)-(1/5+1/10+1/15+1/20)快
(1/2+1/4+1/6+1/8)-(1/3+1/6+1/9+1/12)+(1/4+1/8+1/12+1/16)-(1/5+1/10+1/15+1/20)
1/2 + 1/6 + 1/12 + 1/20 + 1/30+ 1/42 + 1/56 + 1/72=(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 3 2 6 4 () () 12 ()
(1/4+1/6-1/2)除以(-1/12)等于多少?
找规律 1、3、6、2、4( ) ( )12
(1/2+1/4+1/6+1/8)-(1/3+1/6+1/9+1/12)+(1/4+1/8+1/12+1/16)-(1/5+1/10+1/15+1/20)怎么解?
(1/3+1/6+1/9+1/12+1/24)/(1/2+1/4+1/6+1/8+1/16)
1/4、1/9、1/12()、()找规律 1/2、1/6、1/12、1/20、1/30、()、()找规律快当晚
1/2+1/6+1/12+1/20(简算)
找规律,1 3 2 6 4( ) ( ) 12 7
6-(1/2+3/4-5/12)?
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=______1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90 =1/(1*2)+1/(2*3)+1/(3*4)+1/(4*5)+1/(5*6)+1/(6*7)+1/(7*8)+1/(8*9)+1/(9*10) =1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1
找规律填数 4,2,1,1/2,1/4,(),() ,() 1/8,1/32,1/4,1/16,(),(),()1/2,1/6,1/12,1/20,1/30,1/42,(),(),(),