Variables Review

In the expression m - 3, the letter m represents -

• a subtraction symbol

• an unknown number

• a number sentence

• a subtraction problem

Which represents the unknown value in the following statement?
  $d\ \div\ 2\ =\ 11$  

• 2

• 11

•  $\div$  

• d

Which represents the unknown value in the following statement?

t x 3 = 36

• x

• 3

• t

• 36

Bill wants to give away 1,243 baseball cards. He divides the cards equally among 6 friends and writes the equation $1,243\ \div\ 6\ =x$  . What does the x represent in the equation? 

• The number of cards remaining

• The number of Bill's friends

• The number of cards Bill has

• The number of cards each person will receive

 $5n\ +\ 2?$  

Which is the variable in the expression

• +

• n

• 5

• 2

Michael is paid $5.00 per hour, and last week he earned $200. What does the x represent in the equation $6x\ =\ 200?$  

• The number of days Michael worked last month

• The number of hours Michael worked last month

• The number of days Michael worked last week

• The number of hours Michael worked last week

Nathan had twice as many pieces of candy as Devin. If J represents the number of pieces of candy Devin had, which number sentence could be used to find the number of candies Nathan had?

• $J\ \div\ 2\ =\ ?$

• $J\ \times\ 2\ =\ ?$

• $J\ -\ 2\ =\ ?$

• $J\ +\ 2\ =\ ?$

Mrs. Swann bought 4 books of stamps. Each book contained the same number of stamps. If s represents the number of stamps in each book, which of the following could be used to determine the total number of stamps Mrs. Swann bought?

• $s\ +\ 4\ =\ ?$

• $s\ -\ 4\ =\ ?$

• $s\ \times\ 4\ =\ ?$

• $s\ \div\ 4\ =\ ?$

Hailey has 5 more yellow flowers in her collection than blue flowers. If b represents the number of blue flowers in Hailey's collection, which could be used to determine the number of yellow flowers in her collection?

• $b\ +\ 5\ =\ ?$

• $b\ -\ 5\ =\ ?$

• $b\ \times\ 5\ =\ ?$

• $b\ \div\ 5\ =\ ?$

Susan ate 3 fewer pieces of pizza than Kim. If p represents the number of pieces Kim ate, which could be used to determine the number of pieces of pizza Susan ate?

• $p\ \div\ 3\ =\ ?$

• $p\ +\ 3\ =\ ?$

• $p\ \times\ 3\ =\ ?$

• $p\ -\ 3\ =\ ?$