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Number Partitioning Practice

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Number Partitioning Practice

Number Partitioning Practice

Base-ten blocks showing hundreds, tens and ones

🔢 Part 1: Basic Number Partitioning

1. Partition the number 67 into tens and ones:

67 = _____ tens + _____ ones

67 = _____ + _____

2. Partition the number 134 in three different ways:

134 = _____ + _____ + _____

134 = _____ + _____

134 = _____ + _____

3. Circle the correct way to partition 89:

80 + 9

8 + 9

90 + 8

70 + 19

➕ Part 2: Using Partitioning for Addition

4. Solve 45 + 23 using partitioning. Show your working:

45 = _____ + _____

23 = _____ + _____

_____ + _____ = _____

_____ + _____ = _____

Answer: 45 + 23 = _____

5. Use partitioning to solve 126 + 34:
6. Which partitioning strategy would be most helpful for 57 + 28?

50 + 7 and 20 + 8

57 + 20 + 8

55 + 2 and 25 + 3

All of the above

➖ Part 3: Using Partitioning for Subtraction

7. Solve 84 - 32 using partitioning:

84 = _____ + _____

32 = _____ + _____

_____ - _____ = _____

_____ - _____ = _____

Answer: 84 - 32 = _____

8. Use partitioning to solve 156 - 43:

🧠 Part 4: Problem Solving with Partitioning

9. Sarah has 147 stickers. She gives away 25 stickers to her friends. How many stickers does she have left? Use partitioning to solve:

Answer: Sarah has _____ stickers left.

10. A school has 238 students. 46 new students join the school. How many students are there now? Show your partitioning strategy:

Answer: There are _____ students now.

11. Check all the ways you can partition the number 275:

200 + 70 + 5

270 + 5

200 + 75

250 + 25

100 + 175

✏️ Part 5: Explain Your Thinking

12. Explain why partitioning helps us solve addition and subtraction problems more easily:
13. Draw a picture or diagram to show how you would partition the number 163:

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