13.4-3.4*0.5+2.5(递等式)

问题描述:

13.4-3.4*0.5+2.5(递等式)
给位帮帮忙,五分钟能给吗?

13.4-3.4*0.5+2.5
=13.4-1.7+2.5
=11.7+2.5
=14.2