33.1-10.7-(-22.9)+丨-23/10丨 等于多少?

问题描述:

33.1-10.7-(-22.9)+丨-23/10丨 等于多少?

33.1-10.7-(-22.9)+丨-23/10丨
=33.1+22.9-(10.7-2.3)
=56-8.6
=47.4