1. Common methods: Insert-symbols in office, or set shortcut keys for these symbols.

2. Input the symbols of addition, subtraction, multiplication and division directly with the input method, and input the symbols of addition, subtraction, multiplication and division with the method of intelligent ABc: bring up the intelligent ABC and input v 1, and find the symbols of addition, subtraction, multiplication and division later.

3. sogou input method directly uses pinyin to input symbols of addition, subtraction, multiplication and division, and switches or installs sogou input method.

4. sogou input shortcut keys to quickly bring up the symbols of mathematical units. By default, Ctrl+Shift+Z calls up symbol integration, which can quickly insert symbols of addition, subtraction, multiplication and division.