Question

12Ⅹ25+25Ⅹ87+85怎样简便计算

Answer 1

此题采用提取公因数方法进行简算，原式=12*25+87*25+25+60=25*（12+87+1）+60=25*100+60=2500+60=2560

Answer 2

12×25+25×87+85
=12×25+25×87+25+60
=25 × (12+87+1)+60
=25×100+60
=2500+60
=2560