Dividing Fractions: To Divide Fractions: Invert and Multiply
This clip presents the dividing fractions rule of "invert and multiply," explaining that the divisor is inverted and the dividend is multiplied. "Invert means the numerator and the denominator change places," the clip states. The clip also asks and ...
Dividing Fractions: Division as the Opposite of Multiplication
This clip explains that, "
division of fractions, like division of whole numbers, is expected to work as the opposite of multiplication." The clip then provides examples of how it does so, adding that the relationship between division and multiplic...
Dividing Fractions: Why Does Invert and Multiply Work?
This clip takes the viewer on what it calls a "reason-by-reason, step-by-step...side trip" into why the "invert and multiply" rule works. The clip states that it's not absolutely necessary to take this side trip, and that "
as long as you remember ...
Dividing Fractions: Rule For Dividing Fractions, A
This clip puts the rule for dividing fractions known as "invert and multiply" to the test. "To divide one fraction by another," the clip states, "multiply the first fraction--the dividend--by the reciprocal of the second fraction--the divisor."
Dividing Signed Numbers: Dividing Positive by Positive and Negative by Negative
This clip explains that, when dividing signed numbers, if the divisor and dividend have the same sign, the quotient is positive.
Dividing Fractions: Summary: Dividing Fractions
This clip summarizes dividing fractions, comparing it to the division of whole numbers, and examining the "invert and multiply" rule for dividing one fraction by another.
Dividing Fractions: Multiplying By the Reciprocal
This clip explains that dividing by any number is the same as multiplying by its reciprocal.
Dividing Decimal Fractions: Placing the Decimal Point in the Quotient
This clip reviews the concept of changing divisors that are decimals into whole numbers. The clip then poses the following question: "(Once that's done) where do we put the decimal point of the answer, the quotient?" The clip then explains that "
t...
Dividing Decimal Fractions: Figuring to a Given Number of Decimal Places
This clip explains how to approach division of decimals when accuracy is expected to a given number of decimal places. "However many decimal places you want," the clip states, "
if rounding off is required, you must figure out one more and then rou...
Dividing Decimal Fractions: Shortcut For Dividing by Powers of Ten
This clip explains that dividing decimals by powers of ten is very much like multiplying them by powers of ten, except that the decimal moves to the left rather than to the right.