order of operations order of operations

Find the error and fix it.

100

(5-2) + 12 - 5 

   7 + 12 - 5

  19 - 5 

  14

The correct answer is 10.

200

(23-12)+5=67

The correct answer is 16.

300

45-2+12=13

The correct answer is 55. 

400

(67-34)+12-21=30

The correct answer is 24.

500

(34+98)-45+13-2=100

The correct answer is 98.

Extra

100

• Do you do the subtraction first (6 – 3 = 3) and then the multiplication (3 x 2 = 6)?
• Or do you start with the multiplication (3 x 2 = 6) and then subtract (6 – 3 = 3)?

Start with Multiplication

200

Give me one example of Grouping symbols.

(), {}, []

300

30 ÷ 5 x 2 + 1 = 

Using the operation above which you should solve first? 

5x2

400

Multiplication and division are done at the same time, whichever comes first from left to right; meaning if a division operation appears before a multiplication in an expression, you would perform the division first.

True or False?

True

500

Misunderstanding the left-to-right rule for multiplication/division and addition/subtraction can lead to incorrect answers.

True

Solve

100

(5-3)+12

14

200

5+(6-4)+8=

15

300

(4+21)-15+3=

13

400

(56+45)-23+7-6=

79

500

3 X 4 + (2+3) -1=

16

Solve (cont.)

100

(45-12)+4=

37

200

(4+23)-5=

22

300

(34+23)-6+3=

54

400

7 x (8+1) -2

61

500

(120+45)-65-23=

77

Misc.

100

8 X (54-6) 

384

200

What is the acronym of order of operation to help recall the correct order?

PEMDAS/GEMDAS

300

Solve

54 X 70

3,780

400

PEMDAS stands for?

Parentheses, Exponents, Multiplication, Division, Addition and Subtraction

500

Add parenthesis to make the statement true

5 x 3+8 -1 = 54

5 x (3+8) -1 = 54