Order of Operation & Expressions

PEMDAS only works if.... (There are 2 right answers)

• You add then subtract

• You multiply then divide

• When you have multiplication and division only – go left to right.

• When you have addition and subtraction only – go left to right.

Which operation would you do first in the following equation?

10 - 18 + 4 ÷ 1 · 5

• Subtraction

• Division

• Multiplication

• Addition

Which operation would you do first in the following equation?

10 - 18 + 4 ÷ ( 2 · 5 )

• Subtraction

• Division

• Multiplication

• Addition

Which operation would you do first in the following equation?

10 - (18 + 4 ) ÷ 1 · 5

• Subtraction

• Division

• Multiplication

• Addition

Evaluate (10 + 2) X 10 - 3

• 145

• 27

• 117

• 53

Evaluate (1 + 12 / 6 × 2 − 4 ) × ( - 2 )

• 2

• -2

• 4

• -4

What is the product of the expression? -7(-3)

• -10

• 10

• -21

• 21

Evaluate 5 / ( - 5)

• -1

• 0

• -10

• -25

Evaluate ( - 5 ) ÷ ( - 5 )

• 1

• 0

• -10

• 25

Evaluate - 5( - 5 )

• 25

• 5

• -5

• -25