5/12-1/6+2/3简便运算

问题描述:

5/12-1/6+2/3简便运算
3/4+4/9-3/4+4/9 简便运算

5/12-1/6+2/3……
=5/12-2/12+8/12
=11/12
3/4+4/9-3/4+4/9
=(3/4-3/4)+(4/9+4/9)……交换位置.同分母相加减.
=8/9