Rounding Numbers: Rounding Whole Numbers
This clip explains that decimals aren't the only numbers that can be rounded. "Whole numbers can also be rounded," the clip points out. Examples are then provided to show how that's done.
Adding and Subtracting Decimal Fractions: Summary: Adding and Subtracting Decimal Fractions
This clip summarizes the main points of adding and subtracting decimal fractions. It revisits the idea that adding decimal fractions depends on lining up the addends by place value. The clip says that the easiest way to do this is by lining up the d...
Adding and Subtracting Decimal Fractions: Lining Up Numbers on the Decimal Point
This clip explains the importance of lining up the addends by place value when adding decimal fractions. It notes that every decimal fraction has a decimal point and, "
if we line up one column, all the rest line up automatically. Tens, units, tent...
Adding and Subtracting Decimal Fractions: Adding Decimals to Solve a Distance Problem
This clip provides a distance problem which illustrates the fundamentals of adding decimal fractions. The clip suggests entering the decimal point of the answer before starting to add. It also suggests adding a zero to the right of the decimal point...
Adding and Subtracting Decimal Fractions: Subtracting Decimal Fractions
This clip explains that, as with adding decimal fractions, subtracting decimal fractions entails following a five-step process. The only difference, the clip points out, is that we subtract instead of add. The clip stresses that it's important to ma...
Adding and Subtracting Decimal Fractions: Five Steps For Adding Decimal Fractions
This clip explains the five-step sequence that should be followed when decimal fractions are added: first, put in any missing decimal points; second, write the addends in the column lining up the decimal points; third, fill in the gaps on the right ...
Adding and Subtracting Decimal Fractions: Adding Decimal Fractions
This clip explains that, when adding decimal fractions, it's a good idea to first insert the decimal point of the sum. Then, as with whole numbers, we start on the far right and work our way towards the left, adding up the numbers in each column as ...
Weight and Temperature: Converting Between Metric and U.S. Customary Systems
This clip explains how to convert units of weight between the U.S. Customary System and the Metric System, using both the unit cancellation and decimal methods. "Converting between the two systems means that we'll be working with two sets of equival...
Rounding Numbers: Summary: Rounding Numbers
This clip summarizes rounding numbers, explaining that, "
we use rounded numbers either when it's not important to know the exact ones, or when we can't find them." The clip then explains when and how we round up or down.
Weight and Temperature: Metric Unit Equivalences and Conversion
This clip explains that, while there are 7 metric equivalences, we'll use only those that contain the following common metric units to convert units of mass: one metric ton equals 1,000 kilograms; one kilogram equals 1,000 grams; and one gram equals...