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: 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 ...
Adding Fractions with Different Denominators: Finding Common Denominators and Multiples
This clip explains the role of multiples in finding common denominators. It also clarifies the difference between multiples and denominators, noting that "numbers have multiplesÂ…fractions have denominators".
Adding Fractions With the Same Denominator: Changing Mixed Numbers to Improper Fractions
This clip explains that we have to change a mixed number to an improper fraction whenever we want to add, subtract, multiply or divide fractions. The clip then provides a shortcut for changing mixed numbers to improper fractions.
Adding Fractions with Different Denominators: Renaming Fractions
This clip introduces the concept of adding fractions with different denominators. It explains that this is done by re-naming the fractions so that they have the same denominator, which is accomplished by finding the common denominator.
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...
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...
Weight and Temperature: Units of Weight and Unit Equivalences
This clip presents the units of weight in the U.S. Customary System, then provides a number of practical problems that can be solved by using the equivalences for ounce, pound and ton.
Subtracting Fractions: Comparing Fractions With the Same Denominator
This clip explains that if two fractions have the same denominator, the number with the bigger numerator will be to the right of the other on the number line.
Subtracting Fractions: Subtracting Fractions With Different Denominators
This clip explains that subtracting fractions with different denominators requires first writing the two fractions with a common denominator. Once the numerators are determined, it is simply a matter of subtracting the smaller from the larger and ex...