13.68×5.7+13.68×5.3-13.68怎么样简算

问题描述:

13.68×5.7+13.68×5.3-13.68怎么样简算

13.68×5.7+13.68×5.3-13.68
=13.68X(5.7+5.3-1)
=136.8