1. Take the 2345 ace input method as an example. In Chinese mode, if you directly enter the pinyin of Jiajian, a plus sign or a minus sign will appear.

2. With Baidu Pinyin Input Method, you can directly input Pinyin plus sign, and you can also print plus and minus signs.

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

4. Suitable for most input methods. Press and hold Alt, enter 0 177 with the keypad, and the logo will be printed.