13/16乘以(9/13乘以17减9/13)的的简便计算

问题描述:

13/16乘以(9/13乘以17减9/13)的的简便计算

13/16乘以(9/13乘以17减9/13)
=13/16×9/13×17-13/16×9/13
=9/16×17-9/16
=9/16×(17-1)
=9/16×16
=9