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Change Unknown Addition Problems

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Change Unknown Addition Problems worksheet preview

Change Unknown Addition Problems

Children solving math problems with counters

🔍 Part 1: Find the Missing Change

Remember: Start + Change = Total. We need to find the change (how many more were added).

1. There are 6 birds in a tree. Some more birds fly in. Now there are 11 birds. How many birds flew in?

6 + _______ = 11

2. Sam has 8 stickers. His friend gives him some more. Now Sam has 15 stickers. How many stickers did his friend give him?

8 + _______ = 15

3. There are 4 cars in the car park. More cars arrive. Now there are 12 cars. How many cars arrived?

4 + _______ = 12

4. Emma collected 7 shells at the beach. She found some more shells. Now she has 13 shells altogether. How many more shells did she find?

7 + _______ = 13

✏️ Part 2: Choose the Correct Answer

5. Which number makes this number sentence true? 9 + __ = 16

6

7

8

6. Which number makes this number sentence true? 5 + __ = 14

8

9

10

7. Which number makes this number sentence true? 12 + __ = 18

5

6

7

🎯 Part 3: Show Your Working

8. Jake has 3 toy cars. His dad buys him some more toy cars. Now Jake has 10 toy cars. How many toy cars did his dad buy?

Write the number sentence: ________________

Show your working using pictures, numbers, or a number line:

Answer: _______ toy cars

9. There are 11 children playing in the playground. Some more children join them. Now there are 19 children playing. How many children joined them?

Write the number sentence: ________________

Show your working:

Answer: _______ children

10. Explain in your own words: How do you find the missing change in an addition problem?

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