9/11-(2/11+1/5)+1/5的脱式计算(/是指分号)

问题描述:

9/11-(2/11+1/5)+1/5的脱式计算(/是指分号)

9/11-(2/11+1/5)+1/5 去括号
= 9/11-2/11-1/5+1/5
=(9-2)/11
= 7/11