0-(-8)-(-2)-(+5 )=?(-1/2)-(-1/3)-(-1/4)=?7.21-(-9.35)=?

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0-(-8)-(-2)-(+5)=?(-1/2)-(-1/3)-(-1/4)=?7.21-(-9.35)=?0-(-8)-(-2)-(+5)=?(-1/2)-(-1/3)-(-1/4)=?7.21-(

0-(-8)-(-2)-(+5 )=?(-1/2)-(-1/3)-(-1/4)=?7.21-(-9.35)=?
0-(-8)-(-2)-(+5 )=?(-1/2)-(-1/3)-(-1/4)=?
7.21-(-9.35)=?

0-(-8)-(-2)-(+5 )=?(-1/2)-(-1/3)-(-1/4)=?7.21-(-9.35)=?
1,原式=0+8+2-5=5
2原式=-1/2+1/3+1/4=-6/12+4/12+3/12=1/12
3,原式=7.21+9.35=16.56

(1)8X的平方+125=0(2)8(X+5)的立方-27=0 (-3)+()=0()+(-2)=8(-4+()=*2()+(-5)=-9狂急 7(x+3)-2(x-5)+3(x-1)-8=0 数学题有理数0 - (-8) + (-5) -(-3)+(-2)-(-6)=0+(+8)+(-5)+(+3)+(-2)+(+6)( 依 据 )=8-5+3-2+6 ( 依据 )=(-5-2)+(8+3+6)(依据)=-7+17(依据)=10(依据) 8-16= 0-(-30)= 21-(+32)=()+(-8)=-12(-20)-(-4)=(-4)-(-4)=(-8)-5=(+6)+()=-2010-18=(-14)-(-26)=(-4.3)-6.7=2.5-(-3.5)=(-2/3)-1/2=(-3/4)-(-1/3)= 猜成语!“3322(),0+0=?(),7 0 1 2 5 6 7 8()”今天就用啊!“3322(),0+0=?(),7 0 1 2 5 6 7 8 9()”猜三个成语 ( )1() 2() ()3() 4() 5() 6( )7 ()8=0 在括号中填上+或- 是等式成立. (x+5)方-2(x+5)-8=0 0 1 2 3 4 5 6 7 8 9 ( )+( )=( ) ( )-( )=( ) ( )乘( )=( )每个数只0 1 2 3 4 5 6 7 8 9( )+( )=( ) ( )-( )=( ) ( )乘( )=( )每个数只能用一次 0,1,2,3,4,5,6,7,8,9每个数用一次使等式成立 ()+()=().()-()=().()×()=()0,1,2,3,4,5,6,7,8,9每个数用一次使等式成立()+()=().()-()=().()×()=() 在括号内填上数字()0()*().6=5()4()+()()()3=()()()7.()加多一题:(/“是除号)得出:().()()6/2()().()2 0 8等于:()()5 ()余数:0 在括号内填入每步运算的依据(-8)+(-5)+8=(-5)+(-8)+8 ( )=(-5)+[(-8)+8] ( )=(-5)+0 ( )= -5 ( ) 智力体操:成语猜趣1)7 0 8 6 ( )2)一百分之一 ( )3)二分之七 ( )4)2 3 4 5 6 7 8 9 ( )5)0+0=0 ( )6)3 3 2 2 ( )7)2 4 6 8 ( )8 0 2 2 5 4 ( ) ( ) 11 8 0-(-8)-(-2)-(+5 )=?(-1/2)-(-1/3)-(-1/4)=?7.21-(-9.35)=? ()1() 2 ()3() 4 ()5() 6() 7 ()8=0小括号填符号+ 或- (1)2X^2-5X+1=0 (2)16(X+5)^2-8(X+5)=0 (1)2X^2-5X+1=0 (2)16(X+5)^2-8(X+5)=0