cleon would like to estimate the difference between$579 and$85.explain how cleon ccoulduse rounding to make an estimate

http://www.jiskha.com/display.cgi?id=1391557608

Round $579 up to $600. Round $85 up to $100. $600-$100 = $500. (Notice that the exact answer = $494, so $500 isn't far off from it, and $500 serves the pupose well when you don't have a calculator or pencil and paper or just don't want to take time to calculate it.).

To estimate the difference between $579 and $85 using rounding, Cleon can follow the steps below:

1. Identify the tens place in both numbers: The tens place in $579 is 70, and in $85, it is 10.

2. Round both numbers to the nearest ten: Since the number in the tens place of $579 is closer to the next ten (70), it rounds up to $580. Similarly, the number in the tens place of $85 is closer to the previous ten (80), so it rounds down to $80.

3. Calculate the difference between the rounded numbers: Subtract the rounded number for $85 ($80) from the rounded number for $579 ($580). The difference will be $580 - $80 = $500.

By using rounding, Cleon can estimate that the difference between $579 and $85 is approximately $500.

To estimate the difference between $579 and $85 using rounding, Cleon can follow these steps:

1. Round both numbers to the nearest ten, hundred, or thousand depending on the desired level of accuracy. Let's round to the nearest ten for this example.

For $579:
- The digit in the ten's place is 7, which is closer to 10.
- So, rounding $579 to the nearest ten gives us $580.

For $85:
- The digit in the ten's place is 8, which is closer to 10.
- So, rounding $85 to the nearest ten gives us $90.

2. Find the difference between the rounded numbers obtained in step 1.

$580 - $90 = $490

Therefore, by rounding $579 to $580 and rounding $85 to $90, Cleon can estimate the difference to be $490.