Question

The cost of downloading a book from a certain website is $5.99. The cost of downloading a video is $7.99. Tatum's mom downloads 3 books and 5 videos. How much did she spend on downloads?

Answer 1

The Answer Is 57.92 But the easiest way to do it is Rounding it

Answer 2

The easiest way to answer this question is by rounding $5.99 and $7.99 to $6.00 and $8.00. Then multiply 3 by 6 and 5 by 8.
`3 * 6 = 9`
`5 * 8 = 40`
`40 + 9 = 49`. Now to find the exact answer, seeing as $5.99 is 1 cent away from $6.00 and $7.99 is one cent away from $8.00, we can do
`3 * 1 = 3` and
`5 * 1 = 5`
`3 + 5 = 8`, we can see that $49 is 8 cents over. From there we subtract the 8 cents from the $49 and see that the amount she spent on downloads was $48.92.