五减三得二。

Five minus three is two.

数量大减。

The quantity has gone down substantially.

价格照旧，并没有减。

The price is the same as before – it hasn't gone down.

人虽老了，干活不减当年。

Although they are old, their workload hasn't reduced.

工作热情有增无减。

Enthusiasm for work has increased.