15.6x13.1-15.6-1.56x21怎样简算

2025-04-29 08:47:05
推荐回答(1个)
回答1:

15.6x13.1-15.6-1.56x21
=15.6x13.1-15.6-15.6x2.1
=15.6x(13.1-1-2.1)
=15.6x10
=156