Order of Operations Review

Order of Operations

Let's Review!

Multiple Choice

Which expression is equivalent to  $4\left(3+5\right)-3\ •\ 9^2$  ?

•  $14\ •\ 81$  

•  $17\ -\ \left(27\right)^2$  

•  $12\ +\ 20\ -54$  

•  $4\left(8\right)-3\ •\ 81$  

Why do we use the Order of Operations?

To ensure that we all come up with the same values when we add, subtract, multiply, and/or divide different numbers.

Can you imagine?

You believe that you have $700 in your checking account, but the bank calculates that you only have $10 in the account.

How would you feel?

Using the order of operations would ensure that you and the bank calculate the same exact value.

Multiple Choice

PEMDAS helps us remember the ___________of operations when solving expressions and equations.

• option

• order

• answer

Multiple Choice

We MUST always perform this first:

• parentheses

• subtraction

• division

Multiple Choice

When we have BOTH multiplication and division in an expression, we need to perform the operations in order from left to right.

• True

• False

• The order does not matter.

Multiple Choice

When we have an expression with BOTH addition and subtraction, we must perform them in order from left to right.

• True

• False

• It does not matter the order.

9 - 2 x 3

Write this down in your math notebook.

Multiple Choice

What step should we take first to simplify this expression:

9 - 2 x 3

• 9 - 2

• 2 x 3

Multiple Choice

Which is the simplified expression?

9 - 2 x 3

9 - 6

• -3

• 3

• 15

• -15

1 - (7 + 5) x 4

Write this down in your math notebook.

Multiple Choice

What step should we take first to simplify this expression:

1 - (7 + 5) x 4

• 1 - 7

• 7 + 5

• 5 x 4

Multiple Choice

What step should we do next to simplify this expression:

1 - (7 + 5) x 4

1 - 12 x 4

• 1 - 12

• -12 x 4

Multiple Choice

What is the final simplified expression:

1 - (7 + 5) x 4

1 - 12 x 4

1 - 48

• -49

• -47

• 47

• 49