5. Numbers
5.4 Numbers and ranges
5.4.1 En dashes in ranges
Use a closed-up en dash to indicate a range.
groups of 5–10 students
5.4.2 Symbols in ranges
In ranges, repeat those symbols and units that are joined to a numeral.
100°C–150°C
between 100°C and 150°C
20–30 cm
from 20 to 30 cm