简便方法计算:41.2*8.1+11*1.25+53.7*1.9怎么算呢?谢谢
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原式=41.2×8.1+11×1.25+(41.2+12.5)×1.9
=41.2×(8.1+1.9)+12.5×(1.1+1.9)
=412+37.5
=449.5
=41.2×(8.1+1.9)+12.5×(1.1+1.9)
=412+37.5
=449.5
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=41.2*8.1+11*1.25+41.2*1.9+12.5*1.9
=41.2*(8.1+1.9)+11*1.25+1.25*19
=41.2*10+1.25*(11+19)
=412+1.25*30=412+37.5=449.5
=41.2*(8.1+1.9)+11*1.25+1.25*19
=41.2*10+1.25*(11+19)
=412+1.25*30=412+37.5=449.5
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41.2*8.1+11*1.25+53.7*1.9
= 41.28*10+12.5*1.9+11*1.25
=412.8+12.5*(1.9+1.1)
=412.5+37.5
=450
= 41.28*10+12.5*1.9+11*1.25
=412.8+12.5*(1.9+1.1)
=412.5+37.5
=450
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41.2*8.1+11*1.25+53.7*1.9
=53.7*(1.9+8.1)-12.5*8.1+11*1.25
=53.7*10-12.5*(8.1-1.1)
=537-12.5*7
=537-87.5=449.5
=53.7*(1.9+8.1)-12.5*8.1+11*1.25
=53.7*10-12.5*(8.1-1.1)
=537-12.5*7
=537-87.5=449.5
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