Word Problems: Add & Subtract Within 20 — Answer Key
Part A: Solve the Word Problems
Read each problem. Use the box to show your work. Write the answer.
1. Leo had 9 stickers. He gave 4 to his friend. How many stickers does Leo have left?
Answer: 5 stickers
Subtract the stickers given away: 9 - 4 = 5 stickers left.
2. There were 8 cookies on a plate. Mom ate 3. How many cookies are left on the plate?
Answer: 5 cookies
Subtract the cookies eaten: 8 - 3 = 5 cookies left.
3. A farmer has 10 eggs. He uses 6 to make breakfast. How many eggs are left?
Answer: 4 eggs
Subtract the eggs used: 10 - 6 = 4 eggs left.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. The words 'how many are left' tell us to subtract.
The phrase 'how many left' is a subtraction clue word that means to take away.
2. The word 'gave away' tells us to subtract.
The phrase 'gave away' means something was removed, which is subtraction.
3. 10 - 3 = 7
When you subtract 3 from 10, you get 7.
Part C: True or False
Circle True or False for each statement.
1. 8 - 3 = 4.
True False
This is false because 8 - 3 = 5, not 4.