答案与解析: 稍作处理,题中数字就能凑整化简, 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 看用户分享的解题思路 哈哈大笑: =51.2×8.1+11 0