2019年小学数学计算问题练习及答案之凑整（三）(2)
网络资源
2019-05-13 17:23:55
【答案及解析】
原式=51.2×8.1+11×9.25+(512+25)×0.19
=51.2×8.1+11×9.25+512×0.19+25 ×0.19
=51.2×8.1+51.2 ×1.9+11×9.25+0.25×19
=51.2×10+11×0.25+11×9+0.25×19
=512+0.25×30+99
=611+7.5
=618.5
