number 75 videos

Coin Word Problems
Algebra Word Problems Using Systems of Equations
How to solve word problems about values and number of coins.
coins system of equations substitution 
Sum of Digits
Algebra Word Problems Using Systems of Equations
How to solve a problem when asked to switch the digits of a 2digit number.
sum digits word problem 
Scientific Notation
Algebra Exponents
How to move between scientific notation and standard notation of numbers.
power scientific notation 
Inductive Reasoning
Geometry Reasoning, Diagonals, Angles and Parallel Lines
How to define inductive reasoning, and how to find numbers in a sequence.
inductive reasoning deductive reasoning patterns Fibonacci sequence. 
Rounding
PreAlgebra Whole Numbers
How to round whole numbers including estimation errors and real life scenarios

Applications
PreAlgebra Integers
Real word situations that involve operations on positive and negative numbers

Estimating Percents
PreAlgebra Decimals and Percents
Using 1% or 10% to estimate other percents of a given number

Scientific Notation
PreAlgebra Decimals and Percents
How to move between scientific notation and standard notation of numbers.
power scientific notation 
Solving "Greater Than" Absolute Value Inequalities
Precalculus Linear Equations and Inequalities
How to solve an inequality with an absolute value greater than a number.
absolute value inequality making 2 equations union 
Solving "Less Than" Absolute Value Inequalities
Precalculus Linear Equations and Inequalities
How to solve an inequality with an absolute value less than a number.
absolute value inequality making 2 equations intersection 
Strategies for the Math Section
PSAT PSAT Prep
Get familiar with the PSAT Math section, learn the main strategies to master it and improve your PSAT test score
reading the questions choosing your own numbers using figures and diagrams plugging in answers order of difficulty 
Derivatives of Logarithmic Functions
Calculus The Derivative
How to infer the derivative of the natural log function using a calculator investigation.
derivative formula limits derivative the number e numerical approximation of the derivative natural logarithm 
Solving a Quadratic Inequality using a Sign Chart
Algebra 2 Quadratic Equations and Inequalities
How to solve a quadratic inequality using a sign chart.
sign number line sign chart less than greater than quadratic inequality 
Multiplying and Dividing
PreAlgebra Whole Numbers
Looking at how multiplication represents repeated addition, as well as special cases of multiplying and dividing whole numbers

Using the Conjugate Zeros Theorem
Precalculus Polynomial and Rational Functions
How we find the zeros of a polynomial function when one imaginary zero is known.
polynomial functions quadratic functions zeros multiplicity the conjugate zeros theorem the conjugate roots theorem conjugates imaginary numbers imaginary zeros