请问(12*21*4.5*10.2)/(15*4*0.7*5.1)用简便放法做
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![请问(12*21*4.5*10.2)/(15*4*0.7*5.1)用简便放法做](/uploads/image/z/368731-19-1.jpg?t=%E8%AF%B7%E9%97%AE%2812%2A21%2A4.5%2A10.2%29%2F%2815%2A4%2A0.7%2A5.1%29%E7%94%A8%E7%AE%80%E4%BE%BF%E6%94%BE%E6%B3%95%E5%81%9A)
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请问(12*21*4.5*10.2)/(15*4*0.7*5.1)用简便放法做
请问(12*21*4.5*10.2)/(15*4*0.7*5.1)用简便放法做
请问(12*21*4.5*10.2)/(15*4*0.7*5.1)用简便放法做
=(12÷4)×(21÷0.7)×(4.5÷15)×(10.2÷5.1)
=3×30×0.3×2
=54