39×27-9×27+72×27怎样简便计算?

2024-11-25 06:39:26
推荐回答(1个)
回答1:

39X27-9X27+72X27
=27X(39-9+72)
=27X102
=27X(100+2)
=27X100+27X2
=2700+54
=2754