You need to make sure the worksheets you are going to delete is absolutely no use anymore because you cannot bring them back after deleting them. Please follow the steps below to delete multiple worksheets that are not adjacent:
Step 1: Press and hold the "Ctrl" Key, then click the name of worksheets one by one;
Step 2: Right-click on one of the selected worksheet names, and select "Delete" from the list.
Step 3: All selected worksheets will disappear.