计算2/9+1又5/6-(-2/9)+1/2 2/9读作9分之2

问题描述:

计算2/9+1又5/6-(-2/9)+1/2 2/9读作9分之2

2/9+1又5/6-(-2/9)+1/2
=2/9+11/6+2/9+1/2
=2/9×2+11/6+3/6
=4/9+7/3
=4/9+21/9
=25/9
=2又7/9