用简便方法计算 6/11×17- 12 × 3/11×

问题描述:

用简便方法计算 6/11×17- 12 × 3/11
×

6/11×17- 12 × 3/11
=6/11×17- 6× 6/11
=6/11x(17-6)
=6/11x11
=6