要用简便算法314*0.82+31.4*0.8+31.4 53×0.03-0.7÷30
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![要用简便算法314*0.82+31.4*0.8+31.4 53×0.03-0.7÷30](/uploads/image/z/1653254-62-4.jpg?t=%E8%A6%81%E7%94%A8%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95314%2A0.82%2B31.4%2A0.8%2B31.4+53%C3%970.03-0.7%C3%B730)
要用简便算法314*0.82+31.4*0.8+31.4 53×0.03-0.7÷30
要用简便算法
314*0.82+31.4*0.8+31.4 53×0.03-0.7÷30
要用简便算法314*0.82+31.4*0.8+31.4 53×0.03-0.7÷30
314*0.82+31.4*0.8+31.4
=31.4*8.2+31.4*0.8*31.4*1
=31.4*(8.2+0.8+1)
=31.4*10
=314