|-5 1/2|×(1/3-1/2)×3/11÷(1-1/4)
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|-51/2|×(1/3-1/2)×3/11÷(1-1/4)|-51/2|×(1/3-1/2)×3/11÷(1-1/4)|-51/2|×(1/3-1/2)×3/11÷(1-1/4)=11/5*(-1/
|-5 1/2|×(1/3-1/2)×3/11÷(1-1/4)
|-5 1/2|×(1/3-1/2)×3/11÷(1-1/4)
|-5 1/2|×(1/3-1/2)×3/11÷(1-1/4)
=11/5 * (-1/6) *3/11 *3/4
=- 1/120
1、1、2、3、5、( )、( ).
1.(1+1/2+1/3+1/4)*(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4)=2.(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*3=1/2(1-1/3)1/3*5=1/2(1/3-1/5)1/5*7=1/2(1/5-1/7).1/17*19=1/2(1/17-1/19)所以1/1*3+1/3*5+1/5*7+.1/17*19=1/2(1-1/3)+1/2(1/3+1/5)+1/2(1/5-1/7)+.1/2(1/17-1/19)=1/2(1-1/3+1/3-1/5+1/5-1/7+1/7.+1/17-1/19)=1/2(1-1/1
|-5 1/2|×(1/3-1/2)×3/11÷(1-1/4)
(2*3*4*5)*(1/2-1/3-1/4-1/5)
1+1+2+3*5
1、2、3、5,
(1+1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)×(1/2+1/3+1/4)~
(1+1/2+1/3+1/4)乘以(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)乘以(1/2+1/3+1/4)简算
1,1,2,3,3,5,( ),( )
1/2+(-2/3)-(-4/5)+(-1/2)-(+1/3)
1,2,3,5,( ),( ),21.
2/3,1,6/5,4/3,( ),3/2
一道奥数题,急救!(1+1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)×(2+1/3+1/4)
1-3/5+1/2-2/5
计算2*3*4*5*(1/2-1/3+1/4-1/5)
计算 ( 1+1/2)*(1-1/3)*(1+1/4)*(1-1/5)*.*(1+1/1000)*(1-1/1001)
1/6【1/4{1/3(1/2X-1)+3}+5】=1