0.87*3.16+4.64=2.7492+4.64=7.3892
0.87乘以3.16加上4.64=3.16+4.64-0.13x3.16=7.8-0.316-0.0948=7.8-0.416+0.0052=7.384+0.0052=7.3892
0.87乘以3.16加上4.64用简便计算0.87乘以3.16加上4.64=2.7492+4.64=7.3892没有合适的简便方法
