-2+-(5/1)-(-6/1)=?
1/(1+2+3)+1/(4+5+6)+.+1/(100+101+102) =?
1/6(3×-6)=2/5x-3
1/(1*3)+1/(2*4)+1/(3*5)+1/(4*6)+...+1/(8*10)=?
1+(2/5)x=6/5
1/6【1/4{1/3(1/2X-1)+3}+5】=1
6(3分之2x-5)-x=6-(2分之1x+1)
数学计算题:-1/3-5又1/2-(-5/6)+(-2/3)-6又1/2=?
计算填空:1/5+4/(1*5)=1;1/6+4/(2*6)=2
5x-6=(-5)/6+7x,x/3=(1+y)/2
(1) 3y-2x=1 (2)6s=27+5t
(1-1/2)*(1-1/3)*(1-1/4)*(1-1/5)*(1-1/6)*…*(1-1/19)*(1-1/20)=
(34 5 6 8 9 1)2 = 2008