Question

1. what is the word for the abbreviation cm? 2) what is the word for the abbreviation km? 3) what is the word for the abbreviation mm?

Explanation:

1. "cm" stands for centimeter, a unit of length in the metric system.
2. "km" stands for kilometer, a larger - scale unit of length in the metric system.
3. "mm" stands for millimeter, a smaller - scale unit of length in the metric system.

Answer:

1. Centimeter
2. Kilometer
3. Millimeter