Chapter 1.II, Problem 9RE

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8th Edition

Robert Brechner + 1 other

ISBN: 9781305585447

Textbook Problem

Estimate the following by rounding each number all the way; then add to find the exact answer.

Estimate |
Rounded Estimate |
Exact Answer |

To determine

**To calculate:** The round off value of numbers 27,712, 5,281, 368 and then add these rounds off numbers to find rounded estimate and also exact answer.

Explanation

**Given Information:**

The provided whole numbers are 27,712, 5,281, and 368

**Formula used:**

Addition of any whole number can be done by the use following steps:

Step1: first write the provided whole numbers in columns so that place values of units, tens,

hundreds, thousands and so on is lined up

Step2: add the digits in each column starting from the right

Step3: when the total of the column is greater than 9, write the unit digit in that column and carry the tens digit to the top of the next left column.

Rounding off any whole number is done by the use of the following steps:

Step1: first find out the place to which the number is to be rounded

Step2: now if the digit to the right of the place being rounded is 5 or more, increase the digit in that place by 1

Step3: if the digit to the right of the place being rounded is 4or less do not change the digit in the place being rounded

Step4: change all digits to the right of the place which is going to rounded to zeros.

**Calculation:**

Consider the provided whole numbers,

First of all round off all the provided value by the use of above steps

27,712 is rounded to ten thousand place and its estimated value comes out as 30,000

5,281 is rounded to thousand place and its estimated value comes out as 5,000

And 368 is rounded to hundredth place and its estimated comes out as 400...

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