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...
Naming Whole Numbers: System of Decimal Numerals, The
This clip talks about whole numbers and the system that was developed so that they could be written and spoken. It's known as the system of decimal numerals, based on symbols called digits.
Negative Exponents: Expanded Notation and Negative Exponents
This clip explains the use of negative exponents in expanded notation as a way of getting rid of fractions. As an example, the clip states that, "
7 times 1 over 10 becomes 7 times 10 to the power of negative 1. 8 times 1 over 10 to the power of 2 ...
Naming Whole Numbers: Separating Large Numbers Into Periods
This clip explains the use of commas to organize the digits within a number into groups or periods.
Naming Whole Numbers: Expanded Notation
This clip explains that when we write a numeral using words such as "hundreds," "tens" and so on, or numbers like, say, "700," "80," and "9," we are using expanded notation, which makes it much easier to add, subtract, multiply and divide whole numb...
Number Line, The: Introduction to Inequalities
This clip explains how the number line can be used to better understand the idea of inequality, which is based on the fact that, if two numbers aren't equal, one must be greater than the other.
Naming Whole Numbers: Summary: Naming Whole Numbers
This clip summarizes how whole numbers are named, and in the process covers decimal numerals, whole numbers, face value, place value and expanded notation.
Metric System, The: Metric Units, Prefixes, Equivalences and Abbreviations
This clip presents the units for length, fluid volume and mass used in the Metric System. The clip also provides some of the key prefixes and abbreviations for Metric System units of measurement, as well as unit equivalences.
Multiplying Fractions: Multiplying Fractions: Three Problems
This clip provides three practical problems to demonstrate when the ability to multiply fractions is useful. One example involves figuring out the area of a park. The clip points out that this type of problem is approached in the same way, regardles...
Multiplying Fractions: Multiplying Fractions by Whole Numbers
This clip explains what it calls the first rule for multiplying a whole number by a fraction. The answer will be a fraction with a numerator and a denominator. The denominator will be the same as the denominator of the original fraction. The numerat...