1.简便计算16*2/3*(9*1/8) 1/4+5又2/7*1/4+3又5/7除48.8*12.5*100除4 4/9*[3/4-(7/16-0.25)]求未知数x(3+x)*0.4=30*4/25
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![1.简便计算16*2/3*(9*1/8) 1/4+5又2/7*1/4+3又5/7除48.8*12.5*100除4 4/9*[3/4-(7/16-0.25)]求未知数x(3+x)*0.4=30*4/25](/uploads/image/z/450029-29-9.jpg?t=1.%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%9716%2A2%2F3%2A%289%2A1%2F8%29+1%2F4%2B5%E5%8F%882%2F7%2A1%2F4%2B3%E5%8F%885%2F7%E9%99%A448.8%2A12.5%2A100%E9%99%A44+4%2F9%2A%5B3%2F4-%287%2F16-0.25%29%5D%E6%B1%82%E6%9C%AA%E7%9F%A5%E6%95%B0x%283%2Bx%29%2A0.4%3D30%2A4%2F25)
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