1+(-2)+/-2-3/-5-(-9)
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1+(-2)+/-2-3/-5-(-9)1+(-2)+/-2-3/-5-(-9)1+(-2)+/-2-3/-5-(-9)1+(-2)+/-2-3/-5-(-9)=1-2+5-5+9=8
1+(-2)+/-2-3/-5-(-9)
1+(-2)+/-2-3/-5-(-9)
1+(-2)+/-2-3/-5-(-9)
1+(-2)+/-2-3/-5-(-9)
=1-2+5-5+9
=8
5/9+(3/4-1/2)
1+(-2)+/-2-3/-5-(-9)
24点 (1)1 1 9 8 (2)9 9 5 7 (3)9 9 9 7
(5/12-7/9-2/3)/(-1/36)
(-5)-(+3)+(-9)-(-7)+2/1=?
(5/8-1/16)×(2/9+2/3)
(1-3/2*4)*(1-3/3*5)*...*(1-3/7*9)
[5/6-(1/2-1/3)]×9/10
24点:(9、2、2、1) ( 3、2、7、9 )(4、4、6、6 )(2、5、2、8)( 3、5、3、8)
3.228×(-9)+(-3.772)×9+(-3)×9+(-1)∧5+(-3)∧2
计算:(1)1+(-2)+3+(-4)+.+9+(-100) (2)1+(-2)+3+(-4)+5+(-6)+.+(2n-1)+(-2n)
(9√1/45)÷(3/2√3/5)*(1/2√2又2/3)
9()2()7()8()()()()4()()9()6()1 3()5()()()()24()()8 5()()1()()8 9 4()1 6 7()()1()()3 6()()88()()()()2()3 6()5
(2x+1)(3x-2)-6x(x-1)-5x+9
(-2/9)x(-18)+(-5/11)x(-3)x2又1/5
(-4/9)+(+4/5)-(+5/6)-(+9/10)-(1又5/18) (+11)+(-1/2)+(+7)+(-1/6)+(+2)+(-1/3)
这道题怎么做 1,1,2,3,3,9,(),27,5() 3,9,21,39(),()1,1,2,3,3,9,(),27,5() 3,9,21,39(),()
2/(1*3)+2/(3*5)+2/(5*7)+2/(7*9)+.+2/(95*97)+2/(97*99)=?需求讲解