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Instructions
What approximate value should come in place of the question mark (?) in the following questions ? (Note : You are not expected to calculate the exact value.)
Solution
$$(13.5)^{2}$$ = ?
$$(13+0.5)^{2}$$
$$(13)^{2}$$ + 2*13*0.5 + $$(0.5)^{2}$$
169 +13 + 0.25
180 (approx.)
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