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7136 Winnetka Avenue
Winnetka, CA  91306
Phone: (818) 340-5144   Fax: (818) 340-5882
E-mail: stmartinsschool@aol.com

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Excel Basics - Lesson 3

It's time to move on to numbers and actually doing math calculations in Excel. To add numbers together in Excel use the + sign. To subtract numbers in Excel use the - sign. To multiply numbers in Excel use the asterisk *. To divide numbers in Excel use the slash /.  Example 1 below shows the formulas that you can enter to add, subtract, multiply and divide. Example 2 shows the results of the formulas. You would enter the formula in each cell as shown in Example 1. Excel would calculate and show the result in the cell as shown in Example 2. Formulas in Excel always start with the equal = sign. Using formulas allows you to change your data values and have Excel calculate the answer based on any value you enter.

Example 1 - What you would enter in each cell

Cell D2 shows the formula to add cells B2 and C2 together
Cell D4 shows the formula to subtract cell C4 from B4
Cell D6 shows the formula for multiplying cells B6 and C6 together
Cell D8 shows the formula for dividing the value in cell B8 by the value in cell C8

Example 2 - The results Excel would display

Results of formulas can be displayed anywhere within the worksheet as illustrated in the example below:

Example 3

Do you think you have it? Let's try some examples and see! Open Microsoft Excel and do the following:

  1. Create the spreadsheet shown above in Example 3. Do not enter the values in D7 through D10 - enter the appropriate formula to have Excel calculate the amount shown. Refer back to Example 1 for how to write the formula. Remember that formulas in Excel always start with an = sign. Use cell addresses in your formulas! Save this as YourName - Excel3A. 

  2. Start a new workbook and create a spreadsheet similar to the one below showing the total number of students in Middle School by Homeroom Teacher: 6th Grade 13, 7th Grade 16, 8th Grade 12. Save this as YourName - Excel3B

Homeroom Teacher Name Number of Students
   
   
   
   

Total Number of Students:

Formula for Total Goes Here
  1. You are at the grocery store with $25. You buy a gallon of 1% Milk for $5.09, Potato Chips for $2.49, a 11lb bag of baby carrots for $1.99 and a 5lb bag of potatoes for $3.29. Create a spreadsheet detailing what you bought and showing how much money you have left from your $25. Save this as YourName - Excel3C.

  2. At a book store you bought the following items for Christmas: 4 books at $4.99 per book, a book mark for $1.50, 2 decorative  book covers at $3.99 each, and 6 pencils at $0.99 each. Create a spreadsheet showing what you bought and use multiplication to find out the total for each type of item. Then, use addition to total all of the items. Save this one as YourName - Excel3D. 

Go to Lesson 4


St. Martin-in-the-Fields Episcopal School
7136 Winnetka Avenue
Winnetka, CA  91306
Phone: (818) 340-5144   Fax: (818) 340-5882
E-mail: stmartinsschool@aol.com

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