Question

Round 86,284.983451 to the nearest ten thousands?

Answer 1

`86,284.9835`

Explanation:

The first number after the decimal is the tenth place.
The second is hundredths
The third is thousandths
The fourth is ten thousandths
This continues on

From this we know we are looking to round to the fourth decimal.
To know whether to round it up or not we have to look at the fifth decimal place.
If it is 5 or higher we round it up.
If it is 4 or lower we round down.
`86,284.983451`
The fifth decimal is a 5 so we round the 4 up to a 5 to get
`86,284.9835`

Answer 2

`86,284.983451` rounds to `90,000`

Explanation:

`color(red)(8)6  color(lightgray)(284.983451)`

The red `color(red)(8)` is in the ten thousands place.

Because it is actually "eighty-SIX thousand," it is closer to "90 thousand" than it is to "80 thousand."

So it rounds off to
`90,000`