1.3 – order of operations. 1) 3 + 8 2 - 52) 5(9 + 3) – 3 4 3) 7(5 3 + 3 2 )4) 5)6) examples...

1.3 – Order of 1.3 – Order of OperationsOperations

1) 3 + 8 2 - 5 2) 5(9 + 3) – 3 4

3) 7(53 + 32) 4)

5) 6)

13 9 3 18

2[(7 4) 3] 15

24 3 5

9 3

Examples Examples Which operation should be done first? Simplify if necessary!

2 48

938 22

27 149/12

Examples Examples Which operation should be done first? Simplify if necessary!

1) 3 + 8 2 - 5 2) 5(9 + 3) – 3 4

3) 7(53 + 32) 4)

5) 6)

13 9 3 18

2[(7 4) 3] 15

24 3 5

9 3

7) 8)

9) 42 – (52 + 2) 10)

11) 12)

2 2 214 3 (6 12)

5

26 (15 8) [(2 7) 4]

26 2 5

17 6 2

2

7 4

8 7 1

2

16 2 8

10 2 4

∙

Examples Examples Which operation should be done first? Simplify if necessary!

1/2 4

19 29

38 3

Examples Examples Which operation should be done first? Simplify if necessary!

7) 8)

9) 42 – (52 + 2) 10)

11) 12)

2 2 214 3 (6 12)

5

26 (15 8) [(2 7) 4]

26 2 5

17 6 2

2

7 4

8 7 1

2

16 2 8

10 2 4

∙

SummarySummaryMemorize the order of operationsParenthesis, Exponents,

Multiplication/Division, Addition/SubtractionRemember the importance of grouping symbols

ParenthesisFractions

Boss/Secretary PracticeBoss/Secretary PracticeThere are two roles:

BossExplains how to solve the problemDoes not writeMay ask for help if needed

SecretaryListens to the boss and copies down the

solutionMay not talk unless the boss needs help

Must alternate problems (you do one problem, your partner does the next)

Only one person talking per pairOnly one pencil out per pair

Exit SlipExit SlipEvaluate the expression.

3 24 2

HomeworkHomework

1.1-1.3 Review 1.1-1.3 Review WorksheetWorksheet

Whiteboard Practice Whiteboard Practice

• Evaluate the expression when x = 3. 1. 6x

2. 36/x

3. x + 29

4. x – 2

5. 21 - x

• Find the average speed of a car that travels: 1. 120 miles in 3 hours.

2. 90 miles in 1.5 hours.

3. 360 miles in 6 hours.

Whiteboard Practice Whiteboard Practice

• Write the expression in exponential form. 1. Six cubed

2. 4 * 4 * 4 * 4 * 4

3. 5y * 5y * 5y

4. Five squared

5. 3 * 3 * 3 * 3 * 3 * 3 * t

6. 7x * 7x

Whiteboard Practice Whiteboard Practice

• Evaluate the expression when x = 6. 1. x²

2. 2x³

3. (2x)³

4. x² - 3

Whiteboard Practice Whiteboard Practice

Whiteboard Practice Whiteboard Practice

• Evaluate the expression.

2

7 4

8 7 1

Quiz TimeQuiz TimeClear your desks of everything except for a

pencil and a calculatorKeep your eyes on your own paperYou must show all work on the quiz to

receive creditWhen you are finished, find something to do

If you talk, your quiz will not be scoredBE RESPECTFUL

Good luck!