72×69-28×72+59×72的简便运算72×69-28×72+59×72=72×（69-28+59）=72×100=7200
解：72×69-28×72+59×72 ＝72×(69-28+59) ＝72×(69+59-28) ＝72×(128-28) ＝72×100 ＝7200
72×69-28×72+59×72＝72×(69－28＋59）＝72×100＝7200
