3-2/3÷10/21-2/7简便计算

问题描述:

3-2/3÷10/21-2/7简便计算

3-2/3÷10/21-2/7
=3-2/3×21/10-2/7
=3-7/5-2/7
=(105-49+10)/35
=46/35看不懂倒二部算式