2×1.25+4.45×12.5+0.035(简便计算)

问题描述:

2×1.25+4.45×12.5+0.035(简便计算)

2×1.25+4.45×12.5+0.035,你可能少打了一个数,是0.035×125 =2×1.25+44.5×1.25+0.035 =﹙2+44.5﹚×1.25+0.035 =46.5×1.25+0.035 =58.125+0.035 =58.16