140乘24加180乘48.怎么简便计算?

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140乘24加180乘48.怎么简便计算?
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140乘24加180乘48.怎么简便计算?
140乘24加180乘48.怎么简便计算?

140乘24加180乘48.怎么简便计算?
140x24+180x48
=140x24+180x24x2
=140x24+360x24
=(140+360)x24
=500x24
=12000

48*23/47+24/47 =(47+1)*23/47+24/47 =47*23/47+23/47+24/47 =23+1 =24 (乘法分配,结合律)