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Presentation Transcript

Are there two right answers?

- There is only one right answer because of the correct order of operations.
- The right answer is 17.

Order of Operation

- I can use order of operations to simplify numerical expressions.

Essential Questions

- What is the correct order of operations?
- Why is it important to apply the correct order of operations when solving numerical expressions?

PEMDASD

- P Do all parentheses first
- E Apply any exponents
- MD Do all multiplication and division, working from left to right
- AS Do all addition and subtraction, working from left to right
- D or F Division Bar or Fraction Bar (Simplify Fractions)

Be Careful 12 ÷ 3 x 2 12 ÷ 3 x 2 4 x 2 12 ÷ 6 8 2

- be careful to work Multiplication and division from left to right.

- The right way The wrong way

Watch me!

- 5 + 4 + 7 x 3
- 5 + 4 + 21
- 9 + 21
30

Watch me!

- 28 ÷ 4 - (4 + 3)
- 28 ÷ 4 – 7
- 7 - 7
0

Let’s do some together

- 22 + 16 - 8
- 4 + 16 - 8
- 20 - 8
- 12

Let’s do some together

- (6 + 4)2 x 8
- ( 10 )2 x 8
- 100 x 8
- 800

Try it

- 6 + 7 x 8 =
- 16 ÷ 8 - 2 =
- (25 - 11) x 3 =
- 9 x 4 - 6 ÷ 3 =
- 16 ÷ 4 x 2 =
- 2 x 9 ÷ 3 =
- 9 + 6 x (8 - 5) =

Bonus: 2 x (5 + 4) ÷ 32 - 1

Closure

- Close your notes
- Think about the correct order or operations
- Write the correct order on your slate

Order of Operation

- I can use order of operations to simplify numerical expressions.

Essential Questions

- What is the correct order of operations?
- Why is it important to apply the correct order of operations when solving numerical expressions?

PEMDAS

- P Do all parentheses first
- E Apply any exponents
- MD Do all multiplication and division, working from left to right
- AS Do all addition and subtraction, working from left to right
- D Division Bar or Fraction Bar (Simplify Fractions)

Be Careful

Be careful to work Multiplication and division from left to right.

The right way The wrong way

Watch me!

5 + 4 + 7 x 3

Watch me!

- 28 ÷ 4 - (4 + 3)

Let’s do some together

- 22 + 16 - 8

Let’s do some together

(6 + 4)2 x 8

Try it

- 6 + 7 x 8 =
- 16 ÷ 8 - 2 =
- (25 - 11) x 3 =
- 9 x 4 - 6 ÷ 3 =
- 16 ÷ 4 x 2 =
- 2 x 9 ÷ 3 =
- 9 + 6 x (8 - 5) =

Bonus: 2 x (5 + 4) ÷ 32 - 1

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