奥数简便运算一,3.6*31又2/5+43.9*6又2/5+6二,(81.4+1/6+1/4+1/5)/(1/6+1/4+1/5)三,51又2/3除以5/3+71又3/4除以7/4+91又4/5除以9/5四,6又7/10*121+444除以40/99+67*21.2五,(4又1/19-1/17)*(1/7+1/8+1/9)-4*(1/7-1/8+1/9)
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![奥数简便运算一,3.6*31又2/5+43.9*6又2/5+6二,(81.4+1/6+1/4+1/5)/(1/6+1/4+1/5)三,51又2/3除以5/3+71又3/4除以7/4+91又4/5除以9/5四,6又7/10*121+444除以40/99+67*21.2五,(4又1/19-1/17)*(1/7+1/8+1/9)-4*(1/7-1/8+1/9)](/uploads/image/z/131944-40-4.jpg?t=%E5%A5%A5%E6%95%B0%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%E4%B8%80%2C3.6%2A31%E5%8F%882%2F5%2B43.9%2A6%E5%8F%882%2F5%2B6%E4%BA%8C%2C%EF%BC%8881.4%2B1%2F6%2B1%2F4%2B1%2F5%EF%BC%89%2F%EF%BC%881%2F6%2B1%2F4%2B1%2F5%EF%BC%89%E4%B8%89%2C51%E5%8F%882%2F3%E9%99%A4%E4%BB%A55%2F3%2B71%E5%8F%883%2F4%E9%99%A4%E4%BB%A57%2F4%2B91%E5%8F%884%2F5%E9%99%A4%E4%BB%A59%2F5%E5%9B%9B%2C6%E5%8F%887%2F10%2A121%2B444%E9%99%A4%E4%BB%A540%2F99%2B67%2A21.2%E4%BA%94%2C%EF%BC%884%E5%8F%881%2F19-1%2F17%EF%BC%89%2A%EF%BC%881%2F7%2B1%2F8%2B1%2F9%EF%BC%89-4%2A%EF%BC%881%2F7-1%2F8%2B1%2F9%EF%BC%89)
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