Ontario Curriculum Expectation:
4.C2.1 identify and use symbols as variables in expressions and equations.
A variable is a letter of the alphabet or symbol that represents a number we don’t know. It can represent any number.
A constant is a number and it does not change.
Stanley is x years old. x is a variable that represents Stanley’s age. x can represent any number.
Owen ate 6 cookies and Oliver ate n cookies. 6 is a constant because it represents 6 and does not change. n is a variable that represents the number of cookies Oliver ate.
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1 of 151. Question
1. Match what the variables and constants are in the following situation.
Stan is m years older than his sister, Anna. Anna is 13 years old now.

m

13

Variable

Constant
CorrectIncorrect 

2 of 152. Question
2. True or false, there is no variable in the following situation:
Jake slept for 9 hours last night.
CorrectIncorrect 
3 of 153. Question
3. Match what the variables and constants are in the following situation.
Leo had k friends over, and they stayed for 3 hours.

k

3

Variable

Constant
CorrectIncorrect 

4 of 154. Question
4. Match what the variables and constants are in the following situation.
Sia read 2 books in p days.

p

2

Variable

Constant
CorrectIncorrect 

5 of 155. Question
5. What is the constant in the following situation?
Jaime spent 6 hours in class with n students.

The constant is .
CorrectIncorrect 

6 of 156. Question
6. True or false, the variable in the following situation is 14.
Eddy baked 14 cupcakes and Olivia baked t cupcakes.
CorrectIncorrect 
7 of 157. Question
7. Match what the variables and constants are in the following situation.
There were n questions on the quiz. Sophia took 30 minutes to finish the test.

n

30

Variable

Constant
CorrectIncorrect 

8 of 158. Question
8. True or false, there is a constant in the following situation:
Tony went on a 3 km walk this morning.
CorrectIncorrect 
9 of 159. Question
9. Match what the variables and constants are in the following situation.
Jenna had 12 cookies and he gave k cookies to her friends.

k

12

Variable

Constant
CorrectIncorrect 

10 of 1510. Question
10. Fill in the blank with the variable from the following situation.
Noah spent $n to buy 4 toy cars.

The variable is .
CorrectIncorrect 

11 of 1511. Question
11. What is the correct variable expression for “n decreased by 40″?
CorrectIncorrect 
12 of 1512. Question
12. What is the correct variable expression for the following situation?
Margo brought p cookies to split among 6 of her friends.
CorrectIncorrect 
13 of 1513. Question
13. What is the correct variable expression for the following situation?
Niall had 14 marbles and his friend gave him n marbles.
CorrectIncorrect 
14 of 1514. Question
14. What is the correct variable expression for “r increased by 12″?
CorrectIncorrect 
15 of 1515. Question
15. What is the correct variable expression for the following situation?
Jackson had 20 toys and gave m toys to Sarah.
CorrectIncorrect