Exercise 7: Mastering Numbers 1-99
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The ultimate challenge! In this exercise, you'll work with all numbers from 1 to 99. All operands are between 1-99, and intermediate results stay within 0-99, using both hands.
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Show the result on both hands
💡 Tip: For two-digit numbers, remember left hand = tens and right hand = units. For example: 47 = left hand shows 40, right hand shows 7. Practice breaking down numbers into tens and units!
Learning Goals
- Master all numbers 1-99 with both hands
- Coordinate left hand (tens) and right hand (units)
- Handle multi-step calculations smoothly
- Build speed, accuracy, and confidence
Key Concept
Two-Hand System:
- Left hand = Tens place (10, 20, 30... 90)
- Right hand = Units place (1, 2, 3... 9)
- Example: 47 = Left (40) + Right (7)
- Example: 63 = Left (60) + Right (3)
Remember: Each hand works independently but together they represent the full number.