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Introduction to Variables
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Introduction to Variables
Read each question carefully. For the question that asks you to list letters, write every correct answer.
Choose and Identify
1.Which statement best describes a variable in an equation?
- A letter or symbol that stands for a number
- A sign that always means addition
- A number that must be zero
2.Which expression contains a variable?
- 5 + p
- 6 + 3
- 12
3.If a + 3 = 10, what number does a stand for?
- 7
- 13
- 3
4.Write every letter that could be used as a variable from this list: b, 4, r, 0, k.
Match and Complete
5.Match each equation to the value of its variable.
- c + 2 = 9
- d − 3 = 1
- e + 5 = 8
- f − 2 = 6
- 4
- 8
- 7
- 3
6.Complete the equation: 7 + m = 12. What number is m?
7.At first, Jamal has 4 stickers. He gets some more and then has 11 stickers. Write an equation using s for the number of stickers he gets.
8.Solve the equation n − 4 = 5. Show how you find n.
9.Draw 3 stars, then some more stars, to show 3 + t = 7. How many stars does t represent?
10.True or false: The letter x can stand for one number in one problem and a different number in another problem.
TrueFalse
11.In your own words, explain how a variable is used in a math equation.
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