microsoft excel

I have a spread sheet that has the number 1 thru 100 using as labels. I want to change the 1 to 101 and the rest of the labels to adjust accordingly as well... example...

101,102,103,104,105... thru 200....etc etc,....


How do I achieve this without changing each number manually ? thanks,.

Select 2 thru the end. Delete. Change 1 to 101. Highlight 101, copy. Select the rest of the original cells. Paste. Should autonumber.