Question
Determine the sum by suitable rearrangements:
15409 + 178 + 591 + 322
15409 + 178 + 591 + 322
✓
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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