19.93×19.93+19.92×19.92-19.93×19.92-19.92×19.91
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等于0.3985
咨询记录 · 回答于2023-02-14
19.93×19.93+19.92×19.92-19.93×19.92-19.92×19.91
好的好的
简便计算
等于0.3985
19.93×19.93+19.92×19.92-19.93×19.92-19.92×19.9119.93✖️(19.93-19.92)+19.92✖️(19.92-19.91)19.93✖️0.01+19.92✖️0.010.1993+0.19920.3985
利用乘法分配律提取19.93和19.92计算最简便