(2/3+5/9)除以(2/3-5/9)简算

问题描述:

(2/3+5/9)除以(2/3-5/9)简算

(2/3+5/9)除以(2/3-5/9)
=(2/3×9+5/9×9)除以(2/3×9-5/9×9)
=(6+5)÷(6-5)
=11÷1
=1