(-1 1/2)+(- 1/6)= (-1 1/2)+(-2/3)= (-3.4)+4(-1 1/2)+(- 1/6)=(-1 1/2)+(-2/3)=(-3.4)+4.3=(-1 1/4)+(+1.25)=
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(-11/2)+(-1/6)=(-11/2)+(-2/3)=(-3.4)+4(-11/2)+(-1/6)=(-11/2)+(-2/3)=(-3.4)+4.3=(-11/4)+(+1.25)=(-11/
(-1 1/2)+(- 1/6)= (-1 1/2)+(-2/3)= (-3.4)+4(-1 1/2)+(- 1/6)=(-1 1/2)+(-2/3)=(-3.4)+4.3=(-1 1/4)+(+1.25)=
(-1 1/2)+(- 1/6)= (-1 1/2)+(-2/3)= (-3.4)+4
(-1 1/2)+(- 1/6)=
(-1 1/2)+(-2/3)=
(-3.4)+4.3=
(-1 1/4)+(+1.25)=
(-1 1/2)+(- 1/6)= (-1 1/2)+(-2/3)= (-3.4)+4(-1 1/2)+(- 1/6)=(-1 1/2)+(-2/3)=(-3.4)+4.3=(-1 1/4)+(+1.25)=
-17/3
-37/3
0.9
-2/3
(-1又1/2)+(- 1/6)=-1-1/2-1/6=-1-4/6=-1-2/3=-1又2/3
(-1又1/2)+(-2/3)=-1-1/2-2/3=-1-5/6=-1又5/6
(-3.4)+4.3=4.3-3.4=0.9
(-1又1/4)+(+1.25)=-1.25+1.25=0
6÷2(1+2)=?
6÷2(2+1)=?
(1-1/2)+ (1/3-1/4)+ (1/5-1/6)...+ (1/99-1/100)=?
(1/6-1/2-1/3)×24=?-16?
(1-1/2)*(1-1/3)*(1-1/4)*(1-1/5)*(1-1/6)*…*(1-1/19)*(1-1/20)=
1/3(2x+1)-1/6(10x+1)=1解方程式
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*4)+1/(3*5)+1/(4*6)+...+1/(8*10)=?
在1/2、1/3、1/4、1/5、1/6、1/8、1/12、1/20中,哪几个分数的和=1?1=1/( )+1/( )+1/( ) 1=1/()+1/( )+1/( )+1/( ) 1=1/( )+1/( )+1/( )+1/( )+1/( )
6/3(2+1)=?
2(x+1 )=6
1/6【1/4{1/3(1/2X-1)+3}+5】=1
(1) 1+(-2)+3+(-4)+5+(-6)+.+99+(-100)=?(2)(1-1/2)+(1/2-1/3)+(1/3-1/4)+.+(1/1999-1/2000)=?
2-1+6(根号2 -1)=
将下列分数拆成诺干个不同分数单位的和(1)1=1/()+1/()+1/()+1/()(2)5/6=1/()+1/()+1/()(3)1/9=1/()+1/()+1/()+1/()(4)1=1/()+1/()+1/()+1/()+1/()+1/()(括号中要小于20)
解方程3/(1+1)-6/(x-2)=2/(4-x)-1
加上计量单位如:1(只)+1(只)=1(双)10( )+2( )=1( ) 2( )+5( )=1( )6( )+6( )=1( ) 200( )+165( )=1( )
(-2)-(+2/3)=?-2/3-(-1/6)=?(-1/2)-1/3=?