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 tha..
Dividing Signed Numbers: Dividing Positive by Negative and Negative by Positive
This clip explains that, when dividing signed numbers, if the divisor and dividend have different signs, the quotient is negative.
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 Signed Numbers: Introduction to Dividing Signed Numbers
This clip explains that the rules for dividing signed numbers are the same as for multiplying signed numbers, " except, of course, that we divide the absolute values instead of multiplying." When the signs are the same,..
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..
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.
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: 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 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: Few Division Problems, A
This clip offers two practical division problems which can be solved using techniques taught previously, including repeated subtraction and multiplication.