Place Value Let’s look at position after the decimal to help us do some rounding!
Rounding and Estimating When rounding a decimal you must look at the number to the RIGHT of the place value to which you are going to round. If that number if 5 or greater, then you must raise the number by one in the position to which you are trying to round.
Example Round 73.410 to the nearest whole number. Round 2145.721 to the nearest whole number.
Example Round 36.480 to the nearest tenth. Round 9641.702 to the nearest hundredth.
You Try: Round 58.97360 to the nearest Whole Number Tenth Hundredth Thousandth Ten Thousandth
The Basic Steps to Adding or Subtracting Decimals: Line up the numbers by the decimal point. Fill in missing places with zeroes. Add or subtract. Be sure to put the larger number on top when subtracting.
To Multiply Decimals: You do not line up the factors by the decimal. Instead, place the number with more digits on top. Line up the other number underneath, at the right. Multiply Count the number of decimal places (from the right) in each factor. Use the total number of decimal places in your two factors to place the decimal in your product.
Mixed Numbers and Improper Fractions The number 2¾ is an example of a mixed number. It is called a mixed number because it is made up of an integer and a fraction. 2¾ means 2 + ¾ An improper fraction is a fraction whose numerator is greater than its denominator.