Step 1: Click "Insert" in the Word document, and then open the "Insert" toolbar to operate.

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Step 2: In the Insert toolbar, click the symbol button to open some symbol interfaces. After opening the symbol interface, click other symbols to open the symbol interface.

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Step 3, as shown in the figure, after entering the "Symbol" interface, we can click the "V" button indicated by the arrow, and then open the drop-down box of "Subset".

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Step 4: After opening the drop-down box of Subset, we can slide the wheel or drag the slider on the right side of the drop-down box to find the option of Mathematical Operator, and then click the button of Mathematical Operator to jump to the area of Mathematical Operator.

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Step 5: When we open the mathematical operator area, click to select the mathematical operator we want to use, and click the "Insert" button to insert the mathematical symbol, as shown in the figure.

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Step 6: After clicking the Insert button, the corresponding mathematical symbol has been inserted into the Word document, as shown in the following figure.

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