(7/12-5/18)÷1/12-2/3用简便方法计算

问题描述:

(7/12-5/18)÷1/12-2/3用简便方法计算

=(7/12-5/18)×12-2/3
=7/12×12-5/18×12-2/3
=7-10/3-2/3
=7-(10/3+2/3)
=7-4
=3