Solving One-Step Equations: Find the Unknowns!

Maria has some apples. If she buys 5 more apples, she will have 12 apples. How many apples did she start with?

• 8

• 10

• 7

• 6

A book costs $15. If you have $x, how much more money do you need to buy the book?

• 15 - x

• 15 + x

• x + 15

• x - 15

Tom has 20 marbles. He gives away some marbles to his friend and now has 12 marbles left. How many marbles did he give away?

• 15

• 10

• 5

• 8

A box contains some chocolates. If you eat 3 chocolates, there are 10 left. How many chocolates were in the box originally?

• 10

• 15

• 20

• 13

Lily has $50. She spends $x on a toy. If she has $30 left, how much did she spend on the toy?

• 15

• 25

• 20

• 35

A gardener planted 25 flowers. If he plants 10 more flowers, he will have a total of x flowers. How many flowers will he have?

• 30

• 35

• 20

• 40

In a classroom, there are 18 students. If 6 students leave, how many students are left in the classroom?

• 10

• 15

• 8

• 12

A baker made some cookies. If he sells 8 cookies and has 22 left, how many cookies did he make in total?

• 30

• 32

• 28

• 24

A car travels 60 miles. If it has traveled x miles so far, how many more miles does it need to travel to reach 100 miles?

• 100 - x

• x + 40

• 60 - x

• 100 + x

Samantha has a collection of stickers. If she gives away 4 stickers and has 16 left, how many stickers did she have at the beginning?

• 22

• 15

• 20

• 18