Question
Determine the sum by suitable rearrangements: $15409 + 178 + 591 + 322$
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Answer
$15409 + 178 + 591 + 322$
$409 + 91 = 500$ And, $78 + 22 = 100$
Therefore, $(15409 + 591) + (178 + 322) = (16000) + (500) = 16500$
$409 + 91 = 500$ And, $78 + 22 = 100$
Therefore, $(15409 + 591) + (178 + 322) = (16000) + (500) = 16500$
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