奥数题目速算巧算84又4/19X1.375+105又5/19X0.9=?84又4/19X1.375+105又5/19X0.9=?[10又1/20+(3-0.85)除以5/6]除以126.3=(1+1/2)(1+1/4)X(1+1/6)x...X(1+1/10)X(1-1/3)X(1-1/5)X...X(1-1/9)X(1-1/10)=
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![奥数题目速算巧算84又4/19X1.375+105又5/19X0.9=?84又4/19X1.375+105又5/19X0.9=?[10又1/20+(3-0.85)除以5/6]除以126.3=(1+1/2)(1+1/4)X(1+1/6)x...X(1+1/10)X(1-1/3)X(1-1/5)X...X(1-1/9)X(1-1/10)=](/uploads/image/z/8794647-63-7.jpg?t=%E5%A5%A5%E6%95%B0%E9%A2%98%E7%9B%AE%E9%80%9F%E7%AE%97%E5%B7%A7%E7%AE%9784%E5%8F%884%2F19X1.375%2B105%E5%8F%885%2F19X0.9%3D%3F84%E5%8F%884%2F19X1.375%2B105%E5%8F%885%2F19X0.9%3D%3F%5B10%E5%8F%881%2F20%2B%EF%BC%883-0.85%EF%BC%89%E9%99%A4%E4%BB%A55%2F6%5D%E9%99%A4%E4%BB%A5126.3%3D%281%2B1%2F2%29%281%2B1%2F4%29X%281%2B1%2F6%29x...X%281%2B1%2F10%29X%281-1%2F3%29X%281-1%2F5%29X...X%281-1%2F9%29X%281-1%2F10%29%3D)
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