Four Basic Tactics for Equations
A summary of the four basic tactics for solving equations.
Review of Equation-Solving Strategies
Review of three strategies for solving equations.
Identities for Addition and Multiplication Defined
An equation is a statement that two quantities are equal. Explanation of an identity equation and identifying a statement that is not an equation.
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: 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 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."
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 states that, if the numerato...
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 problem become 4/5 plus positive...
Understanding Decimal Fractions: Why Use Decimal Fractions?
This clip explains that we work with decimal fractions because, "
our way of writing numbers depends on the number ten, so sticking with powers of 10 makes the arithmetic very easy."
Solving Equations: Summary: Solving Equations
This clip summarizes how to solve equations. It describes the relationship between word problems, number sentences and equations, noting that the latter are, "
nothing more than a statement that two mathematical expressions are equal." The clip rev...