Question

72x56十36x88的简便方法？

72x56＋36x88

Answer 1

72是36的两倍，可以先把36×88改36×2×44＝72×44，72×56+36×88＝72×56+36×2×44＝72×56+72×44＝72×（56+44）＝72×100＝7200

Answer 2

72×56+36×88
=72×56+36×2×44
=72×56+72×44
=72×（56+44）
=72×100
=7200

Answer 3

原式=72*56+72*44=72*100=7200。