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.
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m
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13
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Variable
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Constant
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2 of 152. Question
2. True or false, there is no variable in the following situation:
Jake slept for 9 hours last night.
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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.
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k
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3
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Variable
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Constant
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4 of 154. Question
4. Match what the variables and constants are in the following situation.
Sia read 2 books in p days.
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p
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2
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Variable
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Constant
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5 of 155. Question
5. What is the constant in the following situation?
Jaime spent 6 hours in class with n students.
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The constant is .
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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.
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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.
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n
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30
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Variable
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Constant
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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.
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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.
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k
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12
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Variable
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Constant
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10 of 1510. Question
10. Fill in the blank with the variable from the following situation.
Noah spent $n to buy 4 toy cars.
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The variable is .
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11 of 1511. Question
11. What is the correct variable expression for “n decreased by 40″?
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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.
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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.
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14 of 1514. Question
14. What is the correct variable expression for “r increased by 12″?
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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.
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