Math Mondays: Chunking Technique

Introduction

• Part of a series to help with aptitude tests (Civil Service Exam, LAE, UPCAT, etc.)
• Focus on Math techniques every Monday
• Topic for today: Chunking

What is Chunking?

• A speed math technique for handling larger numbers
• Benefits: Easier mental calculations
• Concept: Grouping numbers that form bigger chunks together

Importance of Chunking

• Helps save time during exams
• Familiarity with combinations of numbers increases speed
• Example combinations:
  • 9 + 1 = 10
  • 8 + 2 = 10
  • 7 + 3 = 10
  • 6 + 4 = 10
  • 5 + 5 = 10

Applying the Chunking Method

• Example 1: 9 + 1 + 5
  • Instead of adding left to right, group 9 + 1 = 10 and then add 5
  • Result: 15
• Example 2: 9 + 1 + 8
  • Group 9 + 1 = 10, add 8
  • Result: 18
• Example 3: 6 + 9 + 5
  • Combine 6 + 4 (to make 10) and 9
  • Result: 20

Practice Techniques

• Suggestion: Use a "Plate Number Game"
  • Add numbers from car plates seen while traveling
  • Helps train the mind to think faster

Leveling Up Chunking

• Apply chunking to multiple digit numbers
• Example: 18 and 25
  • Think of 20 and 23 to make it easier
  • Result: 43

Statistics Application

• Mean calculation using chunking:
  • Group numbers to make them easier to add
  • Example: Add sets to reach 100
  • Result: Faster calculation of averages

Conclusion

• Encourage practicing the chunking method
• Helps improve confidence in math, especially for children
• Share resources and subscribe for more lessons

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