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Alex multipli...

Question

Alex multiplied 8651 by 98 instead of multiplying by 89. By how much was his answer greater than or less than the correct answer?

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Solution

Wrong answer ; 8651 × 98 = 847798
Correct answer ; 8651 × 89 = 769939

847798 is greater than 769939 by 847798 - 769939 = 77859

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