2.  Review answers  Grades and sample answers posted tonight  Comment sheets available tomorrow (interrupt any meetings) or in class on Thursday

3.  What do you think are the key concepts?

4.  Every non-empty cell is one of › BOOLEAN › TEXT › NUMBER › ERROR

5.  Allow you to make choices  Stored as 0 or 1  Operations: › AND › OR › NOT

6.  Every character, including blanks, takes 1 position  Case sensitivity  Excel doesn’t understand “words” or “sentences”

7.  Errors that Excel will find › Values not found › Bad references › Divide by 0 › Wrong types  Errors that you must check for › Ranges

8.  Reused vs. Single-use › Reused need to use formulas  Single-use tools › Sorting and filtering › Paste values › All of the data functions

9.  Composing and decomposing functions  Hiding columns, rows, worksheets  Simplifying the problem

10.  Absolute vs. Relative  Naming ranges

11.  Formatting numbers vs. Changing › Significant digits  Translating error messages › Don’t care about hidden pieces!  Readability  Graphs