Question

A student multiplied 5684 by 98 instead of 89. How much was his answer greater
than the correct answer?

Answer 1

551156

Step-by-step explanation:

$mistaken \: multiplication \: by \: the \: \\ student \: = 5684 \times 98$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 557032$

$correct \: multiplication = 5684 \times 89$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 505876$

$difference \: between \: the \\ \: wrong \: and \: correct \: answer \\ = 557032 - 505876$

$\: \: \: \: \: \: \: \: \: \: \: \: \: = 51156$

hence, by 51156 his answer was greater than the correct answer