(641+395)÷37简便算法
问题描述:
(641+395)÷37简便算法
答
641=370+271
395=370+25
271+25=296
296=370--74=37*10-74=37*8
370+370+296=37*10+37*10+37*(10-2)=37*28
=28
答
(641+395)÷37
=1036÷37
=28