2. Excel formulas always start with the equal sign (=).
3. The most common formula in Excel is the SUM formula, which adds up the values in a range of cells.
4. A group of cells that are specified by naming the first cell in the group and the last cell is called a range.
5. This Excel command that allows you to repeat actions is called the Repeat command, which is accessed by pressing Ctrl+Y.
6. This Excel command that allows you to correct mistakes is called the Undo command, which is accessed by pressing Ctrl+Z.