1、7/9×5/6+2/9÷6/5
=7/9×5/6+2/9×5/6
=﹙7/9+2/9﹚×5/6
=1×5/6
=5/6,等于6分之5
2、47/32-2/5-6/9×9/10
=47/32-2/5-3/5
=47/32-﹙2/5+3/5﹚
=47/32-1
=15/32,等于32分之15
3、11-11×11/12
=11×﹙1-11/12﹚
=11×1/12
=11/12,等于12分之11
4、﹙2-4/9×3/4﹚÷4
=﹙2-1/3﹚×1/4
=5/3×1/4
=5/12,等于12分之5