This module is from Fundamentals of Mathematics by Denny Burzynski and Wade Ellis, Jr. This module discusses how to round decimals. By the end of the module students should be able to round a decimal number to a specified position.
Section overview
Rounding Decimal Numbers
Rounding decimal numbers
We first considered the concept of rounding numbers in
[link] where our concern with rounding was related to whole numbers only. With a few minor changes, we can apply the same rules of rounding to decimals.
To round a decimal to a particular position:
Mark the position of the round-off digit (with an arrow or check).
Note whether the digit to the immediate right of the marked digit is
less than 5 . If so, leave the round-off digit unchanged.
5 or greater . If so, add 1 to the round-off digit.
If the round-off digit is
to the right of the decimal point, eliminate all the digits to its right.
to the left of the decimal point, replace all the digits between it and the decimal point with zeros and eliminate the decimal point and all the decimal digits.
Sample set a
Round each decimal to the specified position. (The numbers in parentheses indicate which step is being used.)
Round 32.116 to the nearest hundredth.
The digit immediately to the right is 6, and
$\text{6}>\text{5}$ , so we add 1 to the round-off digit:
$\text{1}+\text{1}=\text{2}$
The round-off digit is to the right of the decimal point, so we eliminate all digits to its right.
32.12
The number 32.116 rounded to the nearest hundredth is 32.12.
The digit immediately to the right is 3, and
$\text{3}<\text{5}$ so we leave the round-off digit unchanged.
The round-off digit is to the left of 0, so we replace all the digits between it and the decimal point with zeros and eliminate the decimal point and all the decimal digits.
600
The number 633.14216 rounded to the nearest hundred is 600.
Sometimes we hear a phrase such as "round to three decimal places." This phrase means that the round-off digit is the third decimal digit (the digit in the thousandths position).
67.129 rounded to the second decimal place is 67.13.
The denominator of a certain fraction is 9 more than the numerator. If 6 is added to both terms of the
fraction, the value of the fraction becomes 2/3. Find the original fraction.
2. The sum of the least and greatest of 3 consecutive integers is 60. What are the valu
Mark and Don are planning to sell each of their marble collections at a garage sale. If Don has 1 more than 3 times the number of marbles Mark has, how many does each boy have to sell if the total number of marbles is 113?
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point For:
(6111,4111,−411)(6111,4111,-411)
Equation Form:
x=6111,y=4111,z=−411x=6111,y=4111,z=-411
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=