How do you make a plus minus sign with the keyboard?

Answer 1

The key should be on the top row of your keyboard on the right hand side on the same key as the = sign.

To get the plus (+) symbol press control and the key with both = and + on it.

Should be ~ to press the "Shift" key and the key with the (+) and (=) sign together or just use the number pad on the right side of the full keyboard with the (+) sign.

Answer 2

go to the character map in the start menu. (for PC)