对于奥数题:
计算 ：51.2 ×8.1 + 11 ×9.25 + 537 ×0.19
哈哈大笑的解题思路:
=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
