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Question
A student multiplied 8,035 by 87 instead of multiplying by 78. By how much was his answer greater than or less than the correct answer?
Sum
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Solution
Correct answer = 8,035 x 87 = 6,99,045
8,035
x 87
56245
64280x
6,99,045
Wrong answer = 8,035 x 78 = 626730
8,035
x 78
64280
56245x
626730
∴ Correct answer is greater than the wrong answer by = 6,99,045 - 626730 = 72315
699045
- 626730
72315
shaalaa.com
Consolidating the Sense of Numberness up to 5 Digits, Size, Estimation of Numbers, Identifying Smaller, Larger, Etc.
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