1. Click on Export sheets as... button.
2. Choose sheets you wish to export.
3. How do you want to export the sheets? keeping the formulas or changing to values?
4. You should choose if you want to export the sheets to another open workbook or to create a new workbook with them.
5. Besides, you have option to copy the colors of the workbook where the sheets belong, and if you wish, the workbook will be closed after the exportation action is executed.