Signed Fractions: Multiplying Signed Fractions
This clip explains that the freedom to move the negative sign out front makes multiplication of signed fractions exactly like multiplication of any signed numbers.
Signed Fractions: Solving Equations Whose Solutions Are Negative Numbers or Fractions
This clip explains that, now that we understand signed numbers and fractions, we can solve equations whose solutions are not necessarily whole numbers. The clip states that, " in general, it doesn't matter whether our e..
Signed Fractions: Subtracting Signed Fractions
This clip provides a subtracting signed fractions problem in which negative 3/5 is subtracted from 4/5. The clip advises the student to " change the sign of the subtrahend and change the subtraction to addition. The pro..
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..
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 scen..
Signed Fractions: Why Negative Fractions Are Important
This clip explains that, " it's just as important to introduce negative fractions as any other negative numbers." The clip then provides practical examples of how and when negative fractions are used, such as when money..
Signed Numbers: Absolute Value
Using a number line as a frame of reference, this clip explains that " the absolute value of a number is its distance from the origin" So, negative 3 and positive 3 both have the same absolute value of 3. "We think of a..
Signed Numbers: Comparing Absolute Values
This clip states that, " if you look at the number line, you'll see that all negative numbers are less than all positive numbers." Nonetheless, the clip explains, " even though negative 5 is less than positive 1, the a..
Signed Numbers: Comparing Signed Numbers
This clip explains that one number is smaller than the second if the first is to the left of the second on the number line. This is true with signed numbers as well.
Signed Numbers: Introducing Negative Numbers
This clip uses the number line to illustrate that there can be negative numbers as well as positive numbers. Negative numbers on the number line are located to the left of the zero, rather than to the right.