30 5 1 4 12 6 )
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30 5 1 4 12 6 )
30 5 1 4 12 6 )
30 5 1 4 12 6 )
应该填6
30÷6=5
5÷5=1
1×4=4
4×3=12
12÷2=6
6÷1=(6)
30 5 1 4 12 6 )
(5*6*1/30)12*(-6)+4
(4/15-5/6-2/3)*(-30)还有(-24)*(-5/6+1/12)-6*(7/3-7/2)(3/10+5/3)*-30+12*(1/6+5/4)
找规律3,6,12,20,30,42,(),()1,4,5,4,6,4,(),()2,3,4,5,8,7,(),()1,1,3,5,9,(),()
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)
计算:7/12×(12/7+6/7)=?1/8×【400%×(1/5×30)】
1、1,4,5,4,6,4,11,( ),( ).2、2,3,4,5,8,7,( ),( ).3、0,2,2,4,6,10,( ),( ).4、1,1,1,3,5,9,( ),( ).5、2,6,12,20,30,42,( ),( ).6、1,2,4,7,11,16,( ),( ).7、1,4,3,8,5,12,7,( ),( ).8、1,8,
(14/5+4/1-7/5)*28 4-4*8/3-8/1 30*(15/4+5/3+10/7) (12/5+4/3-6/5)*24 就这4道题,要简便计算啊!(14/5+4/1-7/5)*28 ,4-4*8/3-8/1,30*(15/4+5/3+10/7),(12/5+4/3-6/5)*24
5/8+5/6=( ) 1/7+3/14=( ) 11/18-5/12= 4/9+11/21= 10/11-4/78/9-5/12 2/7+4/5 17/30-4/15帮帮忙
简便计算:(1/6-1/12)×24-4/5
6(x+4)=5(12-x)+30(x-5)
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
1/2+1/6+1/12+1/20+1/30;1/2×3+1/3×4+1/4×5+1/5×6+1/6x7
x+4分之1X=1.5 6分之5/[1-(4分之3+12分之1)]答对我采纳额外加30悬赏
30 -5 6 48 () 12722 4 8 12 选哪个第二个数是5
(3/4-5/12)÷1/6
6-(1/2+3/4-5/12)?
找规律填空:1/12,1/6,1/4,1/3,5/12,1/2,().