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

25- (3.1 x 6 + 5.3)

1.1

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

10 2 x 3 = 30

10 2 = 100. Correct Answer is 300.

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

(4.8 / 2) x 5

12

200
Write the variable expression for: 6 less than y
y - 6
300

What is the third step of this problem?

15 x (7-7) + (5 x 2)

Multiply 15 x 0

300

101  - 6 = 0

101  = 10.  Correct answer is 4.

300

56 ÷ (4+4) + 100

8
300

27 + 4.2 x 8 / 0.2

195

300
Write the variable expression for: the product of a number and 6
6y
400

Tell what 10 3 really means.

It means 10 x 10 x 10

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

[(6.2 x 8.4) - 9.28]

42.8

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
10 3 = 30
10 3 = 10 x 10 x10, which is 1000, not 30.
500
(5 x 4) – 6 ÷ 2 + 9
26
500

36 - 9 / [(0.24 x 5) + (0.66 x 5)]

34

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