The Meaning of Percentage: Very Small Percentages
This clip explains how to deal with very small percents, such as those less than 1 percent. As an example, it uses one-fourth percent, which it states is one quarter of 1%. The clip then goes through the steps necessary to express that in decimal fo...
Multiplying First to Get a Perfect Square in the Radicand
Simplifying a radical by multiplying first to get a perfect square in the radicand.
Simplifying Radicals before Multiplying
Instances are demonstrated where simplifying radicals before multiplying are indicated.
Multiplying Whole Numbers, Part 1: Summary: Multiplying Whole Numbers, Part One
This clip summarizes multiplication of whole numbers, including the relationship between addition and multiplication, the use of arrays, and the results when multiplying numbers by one or zero.
Multiplying Whole Numbers, Part 1: Identity For Multiplication, The
This clip explains that, just as zero is the identity for addition, the number 1 is the identity for multiplication because, any number, when multiplied by 1, "...isn't changed at all."
Multiplying Whole Numbers, Part 1: Arrays
This clip explains that one way to look at multiplication is through a pattern of columns and rows known as an array.
Multiplying Whole Numbers, Part 1: Multiplication Problems
This clip presents a number of multiplication problems and challenges the viewer to use arrays in solving them.
Multiplying Whole Numbers, Part 1: Multiplication By Zero
This clip explains that the product of any number multiplied by zero is zero.
Multiplying Whole Numbers, Part 2: Multiplication Facts For 3
This clip explains that multiplying by 3 "
is like walking along the number line with steps three units long."
Multiplying Signed Numbers: Multiplying Negative Numbers by Positive Numbers
This clip explains that, as when multiplying whole numbers, we can re-arrange the factors as much as we like when multiplying signed numbers. This enables us to solve multiplication problems in which the first factor is negative and the second posit...