– ALGEBRA I – Section 1-2 Grouping Symbols Grouping symbols… Too much fun…
– ALGEBRA I – UNIT 1 – Section 1 Grouping Symbols In this section, we will be looking more closely at… <ul><li>order of operations </li></ul><ul><li>grouping symbols </li></ul><ul><li>simplifying </li></ul><ul><li>evaluating </li></ul>And we’ll be reviewing…
GROUPING SYMBOLS A grouping symbol is used to enclose an expression in order to indicate that that part of the problem should be done first. Common examples of grouping symbols are… In addition to doing the job of grouping expressions, these symbols also indicate multiplication if numbers/variables are side-by-side. What are grouping symbols?
GROUPING SYMBOLS A grouping symbol is used to enclose an expression in order to indicate that that part of the problem should be done first. Many other symbols also act as grouping symbols, but the operation they stand for are the first things that people think of. For example… What are grouping symbols?
OTHER SYMBOLS MULTIPLICATION We’re going to take the chance to review some other symbols that are commonly used. We’ll play a quick game to review… Where’s Mr. Dillon? On the next slide, decide which four symbols indicate multiplication. Then, advance the slide show to see if you are correct…
OTHER SYMBOLS DIVISION Nice work. Let’s try again… Only this time let’s look at symbols for… Where’s Mr. Dillon? On the next slide, decide which three symbols indicate division. Then, advance the slide show to see if you are correct…
OTHER SYMBOLS DIVISION Fraction Bar ÷ % <
ORDER OF OPERATIONS How do grouping symbols fit into order of operations? Let’s edit our current list…
ORDER OF OPERATIONS The steps in order of operations are: 1) Parentheses (Grouping Symbols) 2) Exponents/Roots 3) Add/Subtract (Left to Right) 4) Multiply/Divide (Left to Right) <ul><li>If you are working inside of grouping symbols, follow the remaining steps in order of operations in order. </li></ul><ul><li>If there are grouping symbols inside of other grouping symbols, do the innermost ones first. </li></ul>
Start with innermost parentheses Work your way outward ORDER OF OPERATIONS Add Simplify the power.
Try These Problems… Gives these problems a try. Carefully use order of operations to get your answer. Be sure to show your work! **The answers can be found at the end of the PowerPoint.
Try These Problems… Gives these “evaluate” problems a try. Substitute the numbers in for the variables and simplify. Be sure to show your work! **The answers can be found at the end of the PowerPoint.
ALGEBRA IS FUN AND EASY! **Answers: 1) 24 2) 13 3) 28 4) 18
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