4分之5-7分之6+14分之3x3分之2
问题描述：
4分之5-7分之6+14分之3x3分之2
答
5/4-6/7+3/14×2/3
=5/4-6/7+1/7
=5/4-5/7
=35/28-20/28
=15/28
答
4分之5-7分之6+14分之3x3分之2
=5/4-6/7+1/7
=5/4-（6/7-1/7）
=5/4-5/7
=15/28