简便计算:12*25*(5/12+7/25) 1/128+1/64+1/32+.+1/2简便计算:1/128+1/64+1/32+.+1/212*25*(5/12+7/25)求未知数x1/6x=2/52.5:x=6:1/5
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![简便计算:12*25*(5/12+7/25) 1/128+1/64+1/32+.+1/2简便计算:1/128+1/64+1/32+.+1/212*25*(5/12+7/25)求未知数x1/6x=2/52.5:x=6:1/5](/uploads/image/z/263596-4-6.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%9A12%2A25%2A%285%2F12%2B7%2F25%29+1%2F128%2B1%2F64%2B1%2F32%2B.%2B1%2F2%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%9A1%2F128%2B1%2F64%2B1%2F32%2B.%2B1%2F212%2A25%2A%285%2F12%2B7%2F25%29%E6%B1%82%E6%9C%AA%E7%9F%A5%E6%95%B0x1%2F6x%3D2%2F52.5%EF%BC%9Ax%3D6%3A1%2F5)
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简便计算:12*25*(5/12+7/25) 1/128+1/64+1/32+.+1/2简便计算:1/128+1/64+1/32+.+1/212*25*(5/12+7/25)求未知数x1/6x=2/52.5:x=6:1/5
简便计算:12*25*(5/12+7/25) 1/128+1/64+1/32+.+1/2
简便计算:
1/128+1/64+1/32+.+1/2
12*25*(5/12+7/25)
求未知数x
1/6x=2/5
2.5:x=6:1/5
简便计算:12*25*(5/12+7/25) 1/128+1/64+1/32+.+1/2简便计算:1/128+1/64+1/32+.+1/212*25*(5/12+7/25)求未知数x1/6x=2/52.5:x=6:1/5
简便计算:
1/128+1/64+1/32+.+1/2
=1-1/128
=127/128
12*25*(5/12+7/25)
=12*25*5/12+12*25*7/25
=125+84
=209
求未知数x
1/6x=2/5
x=2/5÷1/6
x=12/5
x=2.4
2.5:x=6:1/5
6x=2.5×1/5
6x=0.5
x=0.5÷6
x=1/12