Measurement and Unit Conversion: Unit Conversion and Cancellation
This clip takes the student through the process of solving problems involving unit equivalences for time. As part of this process, it introduces a number of important terms and concepts, including unit conversion and unit cancellation.
Dividing Whole Numbers, Part 1: Division's Relationship to Multiplication and Subtraction, Part Two
This clip continues the previous discussion about viewing division as a shortcut for repeated subtraction or as the opposite of multiplication.
Dividing Whole Numbers, Part 1: Division's Relationship to Multiplication and Subtraction, Part One
This clip explains that division is a shortcut for repeated subtraction, and is also the opposite of multiplication.
Dividing Signed Numbers: Summary: Dividing Signed Numbers
This clip summarizes the lesson on dividing signed numbers. The clip explains that the first step in dividing signed numbers is to divide their absolute values. "As for the sign of the answer," the clip continues, "
the rule we use in multiplying w...
Dividing Whole Numbers, Part 1: Division Facts
This clip explains that it's not necessary to write out all the division facts, because "
we can get them by working backward from the multiplication table."
Dividing Whole Numbers, Part 1: Few Division Problems, A
This clip offers two practical division problems which can be solved using techniques taught previously, including repeated subtraction and multiplication.
Dividing Whole Numbers, Part 1: Defining Dividend, Divisor and Quotient
This clip defines the three components that make up a division problem: the dividend, divisor, and quotient.
Signed Fractions: Summary: Signed Fractions
This clip summarizes signed fractions. It explains that negative fractions are just as useful as any other kind of negative number. The clip then re-visits the question of what exactly constitutes a negative fraction. It states that, if the numerato...
Signed Fractions: What Is It That's Negative About a Negative Fraction?
This clip asks the question, "What is it that's negative about a negative fraction?", then considers examples when the numerator or the denominator is negative, or when both are. The clip works through each of these scenarios to determine which, if ...
Introducing Fractions: Fractions, the Number Line, and Measurement
This clip explains that, just as every whole number has its place on the number line, so does every fraction. The clip then talks about how to divide the number line into sections that correspond to fractions. The clip also talks about the use of fr...