237+237+327+327+723+723的简便计算

问题描述:

237+237+327+327+723+723的简便计算

237+237+327+327+723+723
=2*(237+327+723)
=2*(1200+27+23+37)
=2500+74
=2574

237+237+327+327+723+723
=2(237+327+723)
=2(1200+37+23+23)
=2400+120+46
=2566