5/14÷[6/7×(2/3+1/6)]用简便运算

问题描述:

5/14÷[6/7×(2/3+1/6)]用简便运算

5/14÷[6/7×(2/3+1/6)]
=5/14 ÷(6/7x2/3+6/7x1/6)
=5/14÷(4/7+1/7)
=5/14÷5/7
=1/2