2/3-1/8-1/6= 1/3+2/5+4/15= 1/4+2/5+3/20= 1-3/4-1/8= 4/5-1/3-2/15=
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2/3-1/8-1/6= 1/3+2/5+4/15= 1/4+2/5+3/20= 1-3/4-1/8= 4/5-1/3-2/15=
2/3-1/8-1/6= 1/3+2/5+4/15= 1/4+2/5+3/20= 1-3/4-1/8= 4/5-1/3-2/15=
2/3-1/8-1/6= 1/3+2/5+4/15= 1/4+2/5+3/20= 1-3/4-1/8= 4/5-1/3-2/15=
2/3-1/8-1/6
=16/24-3/24-4/24
=3/8
1/3+2/5+4/15
= 5/15+6/15+4/15
=1
1/4+2/5+3/20
=5/20+8/20+3/20
=16/20
=4/5
1-3/4-1/8
= 1/4-1/8
=1/8
4/5-1/3-2/15
=12/15-5/15-2/15
=5/15
=1/3
1 2 3 4 5 6 7 8=1
3+2+5+1+8+3+6+4+125=?
口算;3/8+5/8=?1/2-1/3=?1÷1/3=?5/6×24
1/4-1/5=1/18+1/6=1/2-1/8=7/11+5=1/3+1/4=2-1/3=
1+1+1+2+3+6+9+5+2+8+3+9=?
3/1{7/1[5/1(x+2/3+4)+6]+8}=3
1/3{1/7[1/5((x+2)/3+4)+6]+8}=3
1/8{1/6[1/4(x-1/2+3)+5]+7}=1
8/1{6/1{4/1x{2/x-1+3}+5}+7}=1
1/9+1/5+3/5+4/9+2/3+7/8+1/6+5/7+3/7+5/8+3/5+1/8+2/9=?
1+1+2+2+3+3+4+45+5+5+6+67+7+8+9=?
1/(1*2)+2/(1*2*3)+3/(1*2*3*4)+.+8/(1*2*3*4*5*6*7*8*9)=?
1+2+6+3+8+5
1,2,3,4,5,6,8
1×2×3×4×5×6×8
关于发现与探索注意!3/1=三分之一 2×3/1=2成三分之一2×3/1=2/1-3/1 3×4=3/1-4/1 2×4=2/1×(2/1-4/1) 3×5/1=2/1×(3/1-5/1) 3×5/1=2/1×(3/1-5/1) 3×6/1=3/1×(3/1-6/1) 4×7/1=3/1×(4/1-7/1) 5×10/1=5/1×(5/1-10/1) 8×16/1=8/1×(8/1-16/1
1+2+3+4+5+6+7+8+9=?
(2/3-5/6-7/8+1/12)*(-24)=?