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# Formulas and functions

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### Formulas and functions

1. 1. Functions and Formulas Module 6 Lesson 2
2. 2. Formulas <ul><li>Formulas use cell addresses and operators to calculate </li></ul><ul><li>Four Basic Calculations </li></ul><ul><li>Add + =B4+B5 </li></ul><ul><li>Subtract - =B4-B5 </li></ul><ul><li>Divide / =B4/B5 </li></ul><ul><li>Multiply * =B4*B5 </li></ul>
3. 3. Formula Clues and Tips <ul><li>Understand what the formula is asking for in regular math terms. </li></ul><ul><li>Identify the operator required </li></ul><ul><li>Identify the cell addresses required </li></ul><ul><li>Use the order of operations </li></ul><ul><li>ALWAYS start with an equal sign </li></ul>
4. 4. Order of Operations? <ul><li>Parentheses </li></ul><ul><li>Exponents </li></ul><ul><li>Multiplication </li></ul><ul><li>Division </li></ul><ul><li>Addition </li></ul><ul><li>Subtraction </li></ul><ul><li>Please Excuse My Dear Aunt Sally </li></ul>
5. 5. Formula Examples <ul><li>Multiply H3 times C4 </li></ul><ul><ul><li>=H3*C4 </li></ul></ul><ul><li>Add C2 and C3 </li></ul><ul><ul><li>=C2+C3 </li></ul></ul><ul><li>Subtract D4 from C3 </li></ul><ul><ul><li>=C3-D4 </li></ul></ul><ul><li>Divide E3 by C1 </li></ul><ul><ul><li>=E3/C1 </li></ul></ul>
6. 6. Formula Practice: You try it. <ul><li>Divide C7 by A2 </li></ul><ul><li>Add A1 and A2 </li></ul><ul><li>Subtract E5 from D4 </li></ul><ul><li>Multiply B4 times E8 </li></ul>Write your answers on a scratch piece of paper, then advance to the next slide.
7. 7. Formula Practice: Answers <ul><li>Divide C7 by A2 </li></ul><ul><li>=C7/A2 </li></ul><ul><li>Add A1 and A2 </li></ul><ul><ul><li>=A1+A2 </li></ul></ul><ul><li>Subtract E5 from D4 </li></ul><ul><ul><li>=D4-E5 </li></ul></ul><ul><li>Multiply B4 times E8 </li></ul><ul><ul><li>=B4*E8 </li></ul></ul>
9. 9. More Formula Examples <ul><li>Add A3 and A4 then divide by C10 </li></ul><ul><ul><li>=(A3+A4)/C10 </li></ul></ul><ul><ul><li>Start with the equal sign. Remember your order of operations. If you want to ADD A3 and A4 THEN divide by C10, you must enclose A3+A4 in parentheses then divide by C10. </li></ul></ul><ul><li>Find the average of D1 through D6 </li></ul><ul><ul><li>=(D1+D2+D3+D4+D5+D6)/6 </li></ul></ul><ul><ul><li>Start with the equal sign. Remember, to calculate an average, you must first add the numbers, then divide the sum by the number of items. Obeying order of operations, we must enclose our addition in parentheses so that the addition portion is completed first. Then divide by 6. </li></ul></ul>
10. 10. Formula Practice: You try it. <ul><li>Average B3 through B10 </li></ul><ul><li>Add A1 and A2 then divide by B4 </li></ul><ul><li>Subtract E5 from D4 then multiply by B6 </li></ul><ul><li>Add B3 through G3 </li></ul>Write your answers on a scratch piece of paper, then advance to the next slide.
11. 11. Formula Practice: Answers <ul><li>Average B3 through B10 </li></ul><ul><li>=(B3+B4+B5+B6+B7+B8+B9+B10)/8 </li></ul><ul><li>Add A1 and A2 then divide by B4 </li></ul><ul><li>=(A1+A2)/B4 </li></ul><ul><li>Subtract E5 from D4 then multiply by B6 </li></ul><ul><li>=(D4-E5)*B6 </li></ul><ul><li>Add B3 through G3 </li></ul><ul><li>=B3+C3+D3+E3+F3+G3 </li></ul>
12. 12. What about those Functions? <ul><li>Functions are shortcut formulas that use a shortcut word and a range of cells </li></ul><ul><li>Five Basic Functions </li></ul><ul><li>Shortcut For Does </li></ul><ul><li>SUM addition add cells </li></ul><ul><li>AVG average average cells </li></ul><ul><li>MIN minimum find the least </li></ul><ul><li>MAX maximum find the greatest COUNT count how many numbers </li></ul>
13. 13. Function Clues and Tips <ul><li>Understand what the formula is asking for in regular math terms. </li></ul><ul><li>Identify the shortcut word required </li></ul><ul><li>Identify the range of cells required </li></ul><ul><li>ALWAYS start with an equal sign </li></ul>
14. 14. Anatomy of a Function <ul><li>=SUM(A1:A12) </li></ul>equal equal shortcut word range Reads: equal the sum of the range A1 through A12
15. 15. Identifying a Range <ul><li>Range—a selected group of cells that form a rectangle </li></ul><ul><li>ex: (A1:D1) </li></ul><ul><li>Shown within parenthesis </li></ul><ul><li>(First cell : Last cell) </li></ul><ul><li>(A1:D1) 2. (A3:C3) </li></ul><ul><li>(A4:A6) 4. (A7:B7) </li></ul><ul><li>5. (C4:C10) 6. (D3:D9) </li></ul>1 . 2 . 3 . 4 . 5 . 6 . NO SPACES
16. 16. Function Practice: You try it. <ul><li>Average B3 through B10 </li></ul><ul><li>2. Add A1 and A2 then divide by B4 </li></ul><ul><li>3. Count the numbers from A6 to V6 </li></ul><ul><li>4. Add B3 through G3 </li></ul>Write your answers on a scratch piece of paper, then advance to the next slide.
17. 17. Function Practice: Answers <ul><li>Start with equals, then your shortcut word, then the range of cells within parentheses </li></ul><ul><li>Average B3 through B10 </li></ul><ul><li>=AVG(B3:B10) </li></ul><ul><li>Add A1 and A2 then divide by B4 </li></ul><ul><li>=SUM(A1:A2)/B4 </li></ul><ul><li>3. Count the numbers from A6 to V6 </li></ul><ul><li>=COUNT(A6:V6) </li></ul><ul><li>Add B3 through G3 </li></ul><ul><li>=SUM(B3:G3) </li></ul>
18. 18. Formulas v Functions Formula Function = calculates order of operations cell addresses operators shortcut word cell range
19. 19. Got it? Click the button for a brief video. A new website will open, be sure to return to this presentation. <ul><li>Here is a short review. </li></ul>
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