I have a new teacher, and we've been communicating on WeChat. I wrote this:
Question: Why is the 多 in 每个月150个多小时 misplaced?
I searched multiple questions on this topic: 1. Does 多 always come after the measure word？ 2. How to correctly use "多" to say "more than"? 3. Can you still use "Number + MW + 多" when the Number can be more than one MW larger? I didn't find the answer, and sometimes putting the 多 after the measure word seems correct (e.g. 四块多美金 in this answer). I don't get it.
This is perhaps why I'm so confused about this.
I'm starting to feel like the logic here is that 多 represents an unspecified least significant digit. So something like 三块五 becomes 三块多, whereas 三十五块 becomes 三十多块. I'm not sure if this is correct.