Ontario Curriculum Expectation:
2.C2.1 identify when symbols are being used as variables, and describe how they are being used.
A variable is a symbol such as a letter or question mark that represents a number we do not know.
Sammy has 4 cookies. Then, he buys more cookies. Sammy now has 7 cookies.
The question mark represents the unknown number of cookies Sammy buys.
Anne has 9 strawberries. Then, she ate some of the strawberries. Anne has 5 strawberries left.
The letter ‘S’ represents the unknown number of strawberries Anne ate.
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1. What is the variable in the number sentence?
6 − ? = 1CorrectIncorrect
2. What is the variable in the number sentence?
? + 6 = 8CorrectIncorrect
3. What is the variable in the number sentence?
7 + S = 12CorrectIncorrect
4. What is the variable in the number sentence?
B − 4 = 5CorrectIncorrect
5. Choose the correct number sentence for the scenario.
Jada counts her animal stickers. She has 15 animal stickers. She gives some stickers to Alice. Now Jada has 8 stickers. How many stickers did Jada give to Alice?CorrectIncorrect
6. Choose the correct equation for the scenario.
Troy is selling brownies. Troy has sold 6 brownies that are $1 each. How many more brownies does he need to sell to have $12?CorrectIncorrect
7. Choose the correct equation for the scenario.
Megan has $18, then she buys a new toy. Now she has $4 left over. How much did the toy cost?CorrectIncorrect
8. Choose the correct equation for the scenario.
Leo has 9 playing cards. Erik has playing cards too. Together they have 22 playing cards.CorrectIncorrect
9. Choose the correct equation for the scenario.
Mary is 8 years old. The sum of her age and her brother Devin’s age is 18. How old is Devin?CorrectIncorrect
10. Choose the correct equation for the scenario.
Sasha is saving up to buy a new sweater. She has $12 and her mom gave her $8. The sweater Sasha wants is $35. How much more money does Sasha need to save?CorrectIncorrect