Length: Practical Problems: Converting Between the U.S. Customary and Metric Systems
This clip presents three practical problems based on converting between the U.S. Customary and Metric Systems. In the first two problems, an equivalence is used to write a transition factor, which is the only factor needed. In the third problem, an ...
Length: Converting Inches to Yards, Feet to Miles, and Miles to Inches
This clip presents a variety of unit conversion problems which the student is first asked to write in equation form. The student is then instructed to write out fractions using the appropriate equivalence in each case. After cancellation, the studen...
Length: Converting Units of Length Within the U.S. Customary System
This clip presents the basic units of length in the U.S. Customary System, as well as the equivalences for these units. The clip also includes a practical problem involving chain-link fencing that can be solved using these equivalences.
Multiplying Fractions: Summary: Multiplying Fractions
This clip summarizes multiplying fractions, touching on a number of the main rules that apply, revisiting the value of dividing through (or "canceling"), and finally discussing the conversion of mixed numbers to imperfect fractions and back again.
Angles, Arcs and Sectors: Angles, Circles and Sectors
This clip looks at the sector, a fraction of a circle's area formed by a central angle and its arc. "We can find the area of a sector," the clips explains, "
by multiplying the ratio of the central angle to the circle by the area of the circle."
Angles, Arcs and Sectors: Angles, Circles and Arcs
This clip includes several practical problems in its discussion of angles in circles. It also explains how to find the length of an arc.
Using Factoring to Solve an Equation
An equation is presented for solution in which factoring must be used. The solution is detailed and checked.
Using Elimination Twice to Solve a System
To avoid working with fractions or other awkward numbers, it is sometimes preferable to eliminate twice instead of eliminating and then substituting.
Multiplying Fractions: Multiplying Mixed Numbers
This clip explains that, to multiply mixed numbers, "
change your mixed numbers to improper fractions and proceed exactly as before." If the answer is an improper fraction, the clip says to , "
change it back to a mixed number, if you want to."
Adding Fractions With the Same Denominator: Proper Fractions, Improper Fractions and Mixed Numbers
This clip explains that improper fractions are those in which the numerator is larger than the denominator, while a proper fraction is one whose numerator is less than the denominator. The clip also explains that a mixed number is one which combines...