Call up the input method, type "addition and subtraction" on the keyboard, and select "addition and subtraction" in the input method.

Method 2:

1. Click the right mouse button on the input method and select "Soft Keyboard" in the pop-up menu.

2. Select "Mathematical Symbol" in "Soft Keyboard".

You can call this type a soft keyboard. The keyboard "q" corresponds to the "plus or minus" symbol.

On the PC, close the Chinese input method, hold down the ALT key, enter "4 1408" on the numeric keypad on the right side of the keyboard, and then release the ALT key to complete the input.

You can also right-click the "Soft Keyboard" icon of Chinese input method and select "Mathematical Symbol", from which you can select "plus sign or minus sign".

Take the 2345 ace input method as an example. In Chinese mode, if you directly enter the pinyin of "Jiajian", symbols will appear.

2. Use Baidu Pinyin input method to directly input Pinyin plus sign, which can be added and subtracted.

3. Use the soft keyboard of input method-mathematical symbols

It is suitable for most input methods. Hold down Alt, enter 0 177 with the keypad, and the symbol will be typed.