Number Story Problems with Written Expressions

The sum of a number and 3

• 3x

• x - 3

• x + 3

10 more than a number

• x + 10

• 10 > x

• 10x

• x > 10

Three less than a number

• x - 3

• 3 - x

• x < 3

• 3 < x

Which expression represents: "the product of 3 and x increased by 5"? 

• 5x - 3

• 3 - 5x

• 3x + 5

• 3x(5)

Sarah has $40 in her lunch account and pays $2 each day to eat lunch.
Which expression below could be used to represent the total amount of money in Sarah's account after x days?

• 40 + 2x

• 40 - 2x

• 2 + 40x

• 2 - 40x

Tickets to the aquarium cost $27 per person. Write an expression to represent the total cost of tickets for a group of people. Let n represent the number of people in the group.

• 27 + n

• 27n

• 27/n

• 27 - n

There were x cookies at the beginning of a party. By the end of the party, 16 of them had been eaten. Using x, write an expression for the number of cookies that were left.

• 16

• x + 16

• 16 - x

• x - 16

Patsy earns $14 per hour at her job.  She worked h hours last week.  Which expression can be used to find how much Patsy earned last week?

• 14 + h

• 14 - h

• 14h

A camp leader figures that she needs one tent for every three campers, plus a tent for herself. Define a variable and write an expression to represent the number of tents needed.

​ ​ (a)   ​ ​ ​ ​ (b)  

• 1c + 3

• 3c + 1

• t = tents

• 1t + 3

• 3t + 1

• c = (number of) campers

Jordan bought pencils for school.  Each pencil cost $.10.  Let p  represent the number of pencils she bought. Write an expression for the total amount she spent.

• p / .10

• .10p

• p +.10

• p- .10