用简便方法计算,4.8*125,5*2.5*12.5*64,6.5*12.8-6.5*2.8
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![用简便方法计算,4.8*125,5*2.5*12.5*64,6.5*12.8-6.5*2.8](/uploads/image/z/748578-66-8.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%2C4.8%2A125%2C5%2A2.5%2A12.5%2A64%2C6.5%2A12.8-6.5%2A2.8)
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用简便方法计算,4.8*125,5*2.5*12.5*64,6.5*12.8-6.5*2.8
用简便方法计算,4.8*125,5*2.5*12.5*64,6.5*12.8-6.5*2.8
用简便方法计算,4.8*125,5*2.5*12.5*64,6.5*12.8-6.5*2.8
4.8*125=0.6*(8*125)=0.6*1000=600,
5*2.5*12.5*64=(5*2)*(2.5*4)*(12.5*8)=10*10*100=10000,
6.5*12.8-6.5*2.8=6.5*(12.8-2.8)=6.5*10=65.