If you have "summation of 83 82 83" equal to 82.66... you are clearly making a serious error.
False
ribbon commands
home tab- clipboard group is the path to the copy and paste buttons
The minimize and restore buttons
Toggle buttons turn something on or off. Good examples are the Bold, Italic and Underline buttons. When they are on, their particular formatting is used and when they are off, that formatting is not used.
In Excel 2013 what is the name of the custom toolbar where you can attach your own macro buttons
In Excel an equation can be a formula. All formulas in Excel must start with the equals sign. That is what tells Excel it is a formula.
A thin bar at the top of the window containing the title and possibly buttons
When you have a lot of Sheet tabs you can scroll through them or quickly go to the first or last one using the scroll buttons.
f11 or alt f1
250
Type an apostrophe first: '=