Real-Life Math: Identifying Equivalent Expressions

Maria has 3 times as many apples as John. If John has x apples, write an expression for the number of apples Maria has. What is an equivalent expression for 3x?

• x

• 2x

• 4x

• 3x

A book costs $15. If you buy y books, write an expression for the total cost. What is an equivalent expression for 15y?

• 15 + y

• 10y

• 15y

• 20y

Tom is 4 years older than his sister. If his sister is s years old, write an expression for Tom's age. What is an equivalent expression for s + 4?

• s + 4

• s + 5

• s + 2

• s - 4

A car travels 60 miles per hour. If it travels for t hours, write an expression for the distance traveled. What is an equivalent expression for 60t?

• 600t

• 60t

• 60 + t

• t miles

A rectangle has a length of 2x and a width of x + 3. Write an expression for the perimeter of the rectangle. What is an equivalent expression for 2(2x + (x + 3))?

• 2x + 3

• 4x + 3

• 8x + 6

• 6x + 6

Lily has twice as many stickers as her friend. If her friend has y stickers, write an expression for the number of stickers Lily has. What is an equivalent expression for 2y?

• 2y

• y

• y/2

• 3y

A pizza is cut into 8 equal slices. If you eat x slices, write an expression for the remaining slices. What is an equivalent expression for 8 - x?

• 8 / x

• -x + 8

• x - 8

• 8 + x

A school has 200 students. If 50 more students enroll, write an expression for the new total number of students. What is an equivalent expression for 200 + 50?

• 250

• 150

• 300

• 200

A gardener plants 5 rows of flowers with x flowers in each row. Write an expression for the total number of flowers. What is an equivalent expression for 5x?

• 5x is equivalent to 10x

• 5x is equivalent to x * 5

• 5x is equivalent to x + 5

• 5x is equivalent to x + x + x + x + x.

A movie ticket costs $12. If you buy z tickets, write an expression for the total cost. What is an equivalent expression for 12z?

• 12z is equivalent to z * 12.

• 12z + 1

• 12 + z

• z - 12