计算下面各题.3.5/1又1/3+8.5*[12*(1/3--0.3)--0.15],3/2[2/3(1/4X+1)+2]--2又1/2=2/3X、[5--(1又5/6+1又11/18)]/(4+4又1/2*6/7/9/14)、1/3+1/15+135+……1997*1999分之1
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![计算下面各题.3.5/1又1/3+8.5*[12*(1/3--0.3)--0.15],3/2[2/3(1/4X+1)+2]--2又1/2=2/3X、[5--(1又5/6+1又11/18)]/(4+4又1/2*6/7/9/14)、1/3+1/15+135+……1997*1999分之1](/uploads/image/z/2990573-53-3.jpg?t=%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A2%E5%90%84%E9%A2%98.3.5%2F1%E5%8F%881%2F3%2B8.5%2A%5B12%2A%281%2F3--0.3%29--0.15%5D%2C3%2F2%5B2%2F3%281%2F4X%2B1%29%2B2%5D--2%E5%8F%881%2F2%3D2%2F3X%E3%80%81%EF%BC%BB5--%281%E5%8F%885%2F6%2B1%E5%8F%8811%2F18%29%EF%BC%BD%2F%284%2B4%E5%8F%881%2F2%2A6%2F7%2F9%2F14%29%E3%80%811%2F3%2B1%2F15%2B135%2B%E2%80%A6%E2%80%A61997%2A1999%E5%88%86%E4%B9%8B1)
计算下面各题.3.5/1又1/3+8.5*[12*(1/3--0.3)--0.15],3/2[2/3(1/4X+1)+2]--2又1/2=2/3X、[5--(1又5/6+1又11/18)]/(4+4又1/2*6/7/9/14)、1/3+1/15+135+……1997*1999分之1
计算下面各题.3.5/1又1/3+8.5*[12*(1/3--0.3)--0.15],3/2[2/3(1/4X+1)+2]--2又1/2=2/3X、[5--(1又5/6+1又11/18)]/(4+4又1/2*6/7/9/14)、1/3+1/15+135+……1997*1999分之1
计算下面各题.3.5/1又1/3+8.5*[12*(1/3--0.3)--0.15],3/2[2/3(1/4X+1)+2]--2又1/2=2/3X、[5--(1又5/6+1又11/18)]/(4+4又1/2*6/7/9/14)、1/3+1/15+135+……1997*1999分之1
计算下面各题.
3.5/1又1/3+8.5*[12*(1/3-0.3)-0.15]
=3.5×3/4+8.5*[12*1/3-12*0.3-0.15]
=2.625+8.5*[4-3.6-0.15]
=2.625+8.5*0.25
=2.625+2.125
=4.75
3/2[2/3(1/4X+1)+2]--2又1/2=2/3X
1/4x+1+3-2又1/2=2/3x
2/3x-1/4x=1.5
5/12x=1.5
x=3.6
[5-(1又5/6+1又11/18)]/(4+4又1/2*6/7/9/14)
=[5-3又4/9]/(4+27/7*14/9]
=14/9/(4+6)
=14/9/10
=7/45
1/3+1/15+1/35+……1997*1999分之1
=1/2*(1-1/3+1/3-1/5+1/5-1/7+……+1/1997-1/1999)
=1/2*(1-1/1999)
=1/2*1998/1999
=999/1999