minus sign

US /ˈmaɪnəs saɪn/
UK /ˈmaɪnəs saɪn/
"minus sign" picture
1.

負號, 減號

the symbol −, indicating subtraction or a negative value.

:
The temperature dropped to five degrees minus.
溫度降到了零下五度。
You need to put a minus sign before negative numbers.
負數前面需要加一個負號