Question

巧算63乘以36加81乘以72？

巧算63乘以36加81乘以72

Answer 1

这个题目可以运用结合律分配律，进行简便计算，原式＝36×（63+81×2）＝36×（63+162）＝36×225＝18×2×225＝18×450＝9×2×450＝9×900＝8100aqui te amo。

Answer 2

63×36+81×72
=7×9×4×9+81×72
=81×28+81×72
=81×(72+28)
=81×100=8100