Word Stuff
Fix my Mistake
Solve
Solve
Variable Expressions
100
Give the correct order of operations.
Grouping Symbols Exponents Multiplication OR Division Addition OR Subtraction
100
9 - 3 x 2=12
Correct answer is 3. Do x then -, not - then x.
100
3 + 4 x 5
23
100
14 - 2 x 7
0
100
What is a variable?
A letter or symbol that replaces an unknown number
200
Why is it important to know PEMDAS as a mathematician?
So everyone can solve every problem the same (correct) way.
200

5 x 5 + 1=30

Multiply before adding. The correct answer is 26.

200
7 + (2 x 4) - 1
14
200

49 ÷ (3+4)

7

200
Write the variable expression for: 6 less than y
y - 6
300
What is the saying we use to remember the correct Order of Operations?
Please Excuse My Dear Aunt Sally.
300

(3+30/3)+2 = 13

You're supposed to divide before adding. The correct answer is 16.

300

56 ÷ (4+4)

7

300
5 + 14 ÷ 2 × 5
40
300
Write the variable expression for: the product of a number and 6
6y
400

What is the difference between an expression and an equation?

An expression is does not have an equal sign, but an equation does.

400
4 + 5 + 7 - 3 x 2 = 26
You need to follow PEMDAS and do x first. Correct answer is 10.
400
20 – (5+3) x 2 + 4
8
400

(4-1) + (5+ 1)

9

400
Write a variable expression for: the difference of 12 and t
12 - t
500
The problem was 20 - 5 x 2 + 3. My answer was 33. What did I do wrong?
I went from left to right without using the correct order of operations.
500

29 - (15 + 5) + 4 = 23

You are supposed to do parenthesis first. The correct answer is 13.

500
(5 x 4) – 6 ÷ 2 + 9
26
500

(3 x 3 - 3 x 1) + 4 

10

500
Write a variable expression for: the difference of a number times 6 and 2
6n - 2
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