用简便方法计算．①3.5%×9.9 &

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/14 05:37:12

用简便方法计算．
①3.5%×9.9
②4.62+9.9
③7.25×1.8+27.5×0.18．

①3.5%×9.9
=0.035×（10-0.1）
=0.035×10-0.035×1
=0.35-0.035
=0.315
②4.62+9.9
=4.62+10-0.1
=14.62-0.1
=14.52
③7.25×1.8+27.5×0.18
=7.25×1.8+2.75×1.8
=（7.25+2.75）×1.8
=10×1.8
=18

用简便方法计算．①3.5%×9.9 & 用简便方法计算．569+102 &nb 用简便方法计算．3.45×102 &n 用简便方法计算．138×25×4 &n 用简便方法计算．72×53+41×24 用简便方法计算．250×13×4 &n 用简便方法计算．1.7-0.81+1.3-0.19 用简便方法计算．6.74+12.62+24.38+3.26 & 用简便方法计算23×25+76×25+25 &nb 用简便方法计算（1）3.7×99+3.7　　　　用简便方法计算8.16+5.49+2.84+4.51 &nbs 计算： ?