27×73 estimateestimate each of the following product 27 X 73
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=27×73
=(50-23)(50+23)
=(50)²-(23)² [using (a+b)(a-b) =a²-b²]
=2500-529
=1971
=(50-23)(50+23)
=(50)²-(23)² [using (a+b)(a-b) =a²-b²]
=2500-529
=1971
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