59．8×60．2的简便算法怎么算的呢?
问题描述：
59．8×60．2的简便算法怎么算的呢?
答
59.8=60-0.2
60.2=60+0.2
59．8×60．2
=(60-0.2)(60+0.2)
=60²-0.2²
=3600-0.04
=3599.96