alleryRather than counting every square, the quicker way is to:
ADuplicate
BMultiply
CSubtract
DEstimate
Answer & Solution
Correct answer: B. Multiply
1. Counting all the squares one by one takes a long time.
2. The number along the length times the number along the width gives the total.
3. So you should just multiply.
_Source: syllabus Mathematics, 'Math-Magic', Ch 11 'Area and its Boundary'_
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