(36/11*25.8-36/11*16076+18/55*19.6)*(1.25-7/12+5/36)用简便方法
问题描述:
(36/11*25.8-36/11*16076+18/55*19.6)*(1.25-7/12+5/36)用简便方法
应该是:
(36/11*25.8-36/11*16.76+18/55*19.6)*(1.25-7/12+5/36)
答
=(36/11*25.8-36/11*16.76+18/55*2*5*1.96)*(45/36-21/36+5/36)
=36/11*(25.8-16.76+1.96)*29/36
=36/11*11*29/36
=29