105×64-15×99的脱式简便方法?

2025-04-16 03:00:24
推荐回答(1个)
回答1:

简便计算
105×64-15×99
=100x64+5x64-15x100+15
=6400+320-1500+15
=6720-1500+15
=5220+15
=5235