Solving One-Step Equations: Key Info & Inverses

Maria has 15 apples. She gives away some apples to her friend and now has 9 apples left. How many apples did she give away?

• 8

• 10

• 6

• 4

A book costs $12. If you have $5, how much more money do you need to buy the book?

• 5

• 10

• 15

• 7

Tom has a collection of 20 baseball cards. He buys some more cards and now has 30 cards. How many cards did he buy?

• 5

• 15

• 25

• 10

A box contains 25 chocolates. If you eat some chocolates and there are 18 left, how many chocolates did you eat?

• 7

• 12

• 5

• 10

Lily has $50. She spends some money on a toy and now has $30 left. How much did she spend on the toy?

• 25

• 10

• 15

• 20

A gardener planted 40 flowers. If 15 flowers died, how many flowers are still alive?

• 25

• 30

• 35

• 20

Jake has 60 marbles. He gives away some marbles to his friends and now has 45 marbles left. How many marbles did he give away?

• 15

• 10

• 20

• 25

A car can travel 120 miles on a full tank of gas. If it has 30 miles left to travel, how many miles can it still go before needing to refuel?

• 30 miles

• 150 miles

• 60 miles

• 90 miles

Samantha has 80 stickers. She gives away some stickers to her classmates and now has 55 stickers left. How many stickers did she give away?

• 15

• 25

• 30

• 40

A baker made 50 cookies. If he sold some cookies and has 30 cookies left, how many cookies did he sell?

• 20

• 10

• 25

• 15