Variables and Expressions: Interactive Learning Quizzes for 4th Grade Math

Question 1

What does a variable represent?

Accepted Answer

An unknown value

Answer

A known value

Answer

An equation

Answer

A number

Question 2

What is an equation?

Accepted Answer

A statement that two values are equal

Answer

A question that asks you to find the value of something

Answer

An expression that uses variables

Answer

A number

Question 3

Which expression shows the sum of the numbers 5 and y?

Accepted Answer

5 + y

Answer

5 - y

Answer

5 * y

Answer

5 / y

Question 4

What is an example of a variable?

Accepted Answer

x

Answer

5

Answer

+

Answer

100

Question 5

In math, a variable is like a box. What could be inside the box?

Accepted Answer

A letter that stands for a number we don't know yet

Answer

A specific number

Answer

Any number

Answer

An expression that shows how to calculate a number

Question 6

Which of these shows a math sentence that has an equals sign? That's called an equation.

Accepted Answer

5 + x = 10

Answer

x + 5

Answer

x is a number

Answer

y is bigger than 3

Question 7

In the equation x + 5 = 12, what number should we put in place of x to make the equation true?

Accepted Answer

7

Answer

5

Answer

12

Answer

17

Question 8

A farmer has 12 pigs. He has twice as many pigs as cows. How many cows does he have?

Accepted Answer

6

Answer

2

Answer

10

Question 9

What is a letter used for in a math expression if we don't know the number it stands for?

Accepted Answer

A variable

Answer

A symbol

Answer

An operation

Answer

A shape

Question 10

Which of the following is an example of a variable?

Accepted Answer

A letter or symbol that represents an unknown value, like x

Answer

A specific number, like 10

Answer

A word that describes something, like 'red'

Answer

A name of a person or place, like 'Sarah' or 'Chicago'

Question 11

Which variable expression represents the perimeter of a rectangle with length x and width y?

Accepted Answer

2x + 2y

Answer

x + y

Answer

x - y

Answer

2x - 2y

Question 12

Which expression is equal to 5 squared?

Accepted Answer

5 multiplied by itself

Answer

5 multiplied by 5

Answer

5 added to itself 5 times

Answer

5 divided by itself

Question 13

Solve for x: 2x - 5 = 9

Accepted Answer

7

Answer

2

Answer

14

Answer

45

Question 14

Which property of variables is incorrect?

Accepted Answer

Variables represent specific numbers.

Answer

Variables can have different values.

Answer

Variables can be any letter or symbol.

Answer

Variables can be used in equations.

Question 15

What represents an unknown value in mathematics?

Accepted Answer

A letter

Answer

A number

Answer

A symbol

Answer

A shape

Question 16

Which expression is equivalent to (3x)^2?

Accepted Answer

9x^2

Answer

3x^2

Answer

6x^2

Answer

36x^2

Question 17

Which of the following expressions shows the sum of two unknown numbers, a and b?

Accepted Answer

a + b

Answer

a - b

Answer

a * b

Answer

a / b

Question 18

What is the coefficient of x in the expression 5x + 2?

Accepted Answer

5

Answer

2

Answer

x

Answer

1

Question 19

Which of the following expressions is equal to 3(x + 4)?

Accepted Answer

3x + 12

Answer

x + 12

Answer

3x + 4

Answer

x + 3(4)

Question 20

Which of the following expressions represents the area of a rectangle with a length of x and a width of 5?

Accepted Answer

5x

Answer

x + 5

Answer

x - 5

Answer

x/5

Question 21

Evaluate the expression (2 + 3) * 4.

Accepted Answer

14

Answer

5

Answer

10

Answer

20

Question 22

Identify the variable that is being multiplied by 5 in the expression 5y + 2?

Accepted Answer

y

Answer

None of the above

Answer

2

Answer

5

Question 23

Which expression is considered an algebraic expression?

Accepted Answer

3x + y - 2

Answer

x = 5

Answer

10

Question 24

Which expression represents the phrase '5 less than twice a number n'?

Accepted Answer

2n - 5

Answer

n - 2(5)

Answer

2(n - 5)

Answer

5 - 2n

Question 25

Simplify the expression: 2x + 3x - 5x

Accepted Answer

0

Answer

-x

Answer

x

Answer

5x

Question 26

Which term in the expression 3x^2 + 2x - 5 is classified as a constant term?

Accepted Answer

-5

Answer

2

Answer

3

Answer

x

Question 27

Let 'b' represent the number of blue marbles. You have 3 more red marbles than blue marbles. Which expression shows the number of red marbles?

Accepted Answer

b + 3

Answer

3b

Answer

b - 3

Answer

3 - b

Question 28

What is the value of the expression '2x + 5' when x is 3?

Accepted Answer

11

Answer

16

Answer

1

Answer

6

Question 29

A bakery sells cookies in boxes of 12. Let 'c' represent the number of boxes sold. Which expression shows the total number of cookies sold?

Accepted Answer

12c

Answer

c / 12

Answer

c + 12

Answer

12 - c

Question 30

Which of these is NOT an algebraic expression?

Accepted Answer

10 + 5 = 15

Answer

3y + 7

Answer

4 - 2x

Answer

5a

Question 31

Let 'n' represent the number of apples in a basket. You take out 5 apples. Which expression shows the number of apples left?

Accepted Answer

n - 5

Answer

n + 5

Answer

5n

Question 32

You have 'p' pencils and your friend has twice as many. Which expression shows the total number of pencils you both have?

Accepted Answer

p + 2p

Answer

2p / p

Answer

2p - p

Answer

p - 2p

Question 33

Which of these is an algebraic expression?

Accepted Answer

6k + 2

Answer

7 = 7

Answer

3 + 9 = 12

Answer

12 > 4

Question 34

Let 'w' represent the number of weeks in a month. There are 7 days in a week. Which expression shows the total number of days in a month?

Accepted Answer

7w

Answer

w + 7

Answer

w / 7

Answer

7 - w

Question 35

What is the value of the expression '3m - 4' when m is 6?

Accepted Answer

14

Answer

2

Answer

18

Answer

22

Question 36

Which expression is equal to 5 + 3?

Accepted Answer

8

Answer

5 - 3

Answer

3 x 5

Question 37

To evaluate the expression 2x + 5 when x = 3, which of the following calculations should be performed?

Accepted Answer

Substitute x with 3 and add 5

Answer

Divide both sides by 2

Answer

Multiply x by 5 and add 2

Answer

Subtract 3 from both sides

Question 38

Which equation correctly translates the statement "Five more than a number y is 12"?

Accepted Answer

y + 5 = 12

Answer

y - 5 = 12

Answer

5y = 12

Answer

12y = 5

Question 39

Which expression represents the sum of the numbers m and n?

Accepted Answer

m + n

Answer

m * n

Answer

m / n

Answer

m - n

Question 40

Which expression is equivalent to 3(x + 2)?

Accepted Answer

3x + 6

Answer

3x + 2

Answer

6x + 2

Answer

x + 6

Question 41

Which expression represents the area of a rectangle with length 'l' and width 'w'?

Accepted Answer

l * w

Answer

l + w

Answer

l - w

Answer

l / w

Question 42

If 't' represents the number of hours, what expression shows the total number of hours after working 5 more hours?

Accepted Answer

t + 5

Answer

5t

Answer

t - 5

Answer

t / 5

Question 43

What is the value of the expression '3r + 2' when r = 6?

Accepted Answer

20

Answer

11

Answer

12

Answer

34

Question 44

Which expression represents the phrase '5 less than twice a number 'x''?

Accepted Answer

2x - 5

Answer

5x - 2

Answer

x - 5

Answer

2x + 5

Question 45

If 'n' represents a number, which equation shows 'n' decreased by 9 equals 10?

Accepted Answer

n - 9 = 10

Answer

9n = 10

Answer

n + 9 = 10

Question 46

A store has 'b' bags of apples. They receive 10 more bags of apples. Which expression shows the total number of bags of apples the store now has?

Accepted Answer

b + 10

Answer

10b

Answer

b - 10

Answer

b / 10

Question 47

What is the value of the expression '3x - 4' when x = 5?

Accepted Answer

11

Answer

7

Answer

19

Question 48

Which expression represents 'the product of 4 and a number, decreased by 3'?

Accepted Answer

4n - 3

Answer

4n + 3

Answer

n - 3

Answer

3n - 4

Question 49

If 'y' represents the number of yellow crayons in a box, and there are 3 more blue crayons than yellow, which expression shows the number of blue crayons?

Accepted Answer

y + 3

Answer

y / 3

Answer

y - 3

Answer

3y

Question 50

What is the value of the expression '2t + 1' when t = 6?

Accepted Answer

13

Answer

12

Answer

7

Answer

19

Question 51

A baker makes 'c' cookies. He gives 4 cookies to his neighbor. Which expression shows how many cookies the baker has left?

Accepted Answer

c - 4

Answer

c / 4

Answer

4c

Answer

c + 4