99x27+27怎样简便运算解:99x27+27=(99+1)x27=100x27=2700
99个27加一个27相就成了100个27 或27个100或2700
解:99×27+27原式=(99+1)×27 =100×27 =2700
99*27+27=(99+1)*27=100*27=2700
99 x 27 + 27 = 100 x 27 =2700