Khan Academy
Challenge Example: Sum of Integers, Linear Equations, Algebra I
The sum of three consecutive odd integers is 231. What is the largest integer? See how to unpack this word problem, set up an equation, and solve for the variable.
Khan Academy
SAT Prep: Test 8 Section 5 Part 2
Sal again makes the SAT look effortless, and yet students will follow his mathematical processes with ease. Problems range in difficulty, from basic algebra equations to more complicated geometric figures.
Khan Academy
SAT Prep: Test 8 Section 5 Part 3
Have a blast with Sal as he solves these SAT practice questions! He enjoys himself with visualization and combination problems, showing not only how to solve the problems but to see math as a riddle rather than a threat.
Khan Academy
SAT Prep: Test 7 Section 8 Part 3
After finishing problem 10 about congruent angles inside a polygon, Sal goes on to solve additional problems involving reciprocals, odd integers, and slopes. Those who have a difficult time moving efficiently through different skill sets...
Khan Academy
SAT Prep: Test 6 Section 7 Part 1
Another SAT practice test from The Official SAT Study Guide is the focus of this video, which starts out with simple problems involving integers, factoring, perimeters, and percentages. Students will appreciate the relative ease with...
Khan Academy
SAT Prep: Test 2 Section 9 Part 2
Assisting students with test-taking strategies, especially easier ways to solve multiple choice problems, Sal solves problems 6-9 on page 488 of The Official SAT Study Guide. Skills such as adding angles and solving for integers are the...
Curated OER
How Do You Find the Greatest Common Factor of Three Numbers?
Use prime factorization to find the greatest common factor of three given values. What are the factors that all three given numbers have in common? Identify them, and then multiply together to get the greatest common factor. Just like...
Curated OER
How Do You Find the Greatest Common Factor of Monomials?
Use prime factorization to find the greatest common factor of four given values. What are the factors that all four given values have in common? Identify them, and then multiply together to get the greatest common factor. Just like that....
Curated OER
How Do You Do Long Multiplication?
Multiplying multi-digit numbers without a calculator. First, make sure you align the numbers properly. It's not just about multiplying, there's carrying numbers and adding numbers and placeholders. You can do it, just remember to line up...
Curated OER
How Do You Add Integers Using a Number Line?
Confused about adding integers? Use a number line to help you get a visual on which way to move according to the sign of the numbers. Negative means you move left on the number line and then of course positive numbers mean you move to...
Curated OER
How Do You Multiply a Two-Digit Number by a Two-Digit Number Using Partial Products?
What are partial products? The teacher uses a geometric model to illustrate how to break up double digit numbers to find the product of the numbers being multiplied. It's a good visual for your students who might need to see how the math...
Curated OER
How Do You Multiply a Two-Digit Number by a One-Digit Number?
The instructor uses diagrams to illustrate a model of how to multiply 3 times 26. Multiplication is a form of addition. She states that the larger rectangles represent 10 and the small squares have a value of 1. She explains how to get...
Curated OER
Odd Numbers
Peter from the number underground is here to tell your class a math secret. He explains odd numbers. This clip is super cute and engaging plus it does a great job providing rules to determine if a number is odd or not. The math...
Curated OER
How Do You Subtract Polynomials Vertically?
Subtract polynomials? Huh? First off find the additive inverse of the number you are subtracting. Next rewrite the polynomials one on top of the other. Make sure to line up the like terms and then write in placeholders. Now add the terms...
Curated OER
How Do You Add Polynomials Vertically?
The instructor demonstrates how to line up two polynomials vertically to add them together. She emphasizes lining up the terms with the same powers. She also identifies some places where there is no term and shows how to write a...
Curated OER
How Do You Multiply a Two-Digit Number by a Two-Digit Number Using Partial Products?
What are partial products? The teacher uses a geometric model to illustrate how to break up double digit numbers to find the product of the numbers being multiplied. It's one method and is a good visual for your students who might need...
Curated OER
How Do You Multiply a Two-Digit Number by a One-Digit Number?
The instructor uses diagrams to illustrate a model of how to multiply 3 times 26. Multiplication is a form of addition. She states that the larger rectangles represents 10 and the small squares have a value of one. She explains how to...
Curated OER
How Do You Do Long Multiplication?
Multiplying multi-digit numbers without a calculator. First, make sure you align the numbers properly. It's not just about multiplying, but there's carrying numbers and adding numbers and placeholders. You can do it, just remember to...
Curated OER
What are Consecutive Numbers?
The instructor writes an example of integers in consecutive order, or counting order, and also an example of integers not in consecutive order. She then shows two special types of consecutives number patterns.
Curated OER
What is a Rational Function?
A rational function can be written as a ratio of two polynomials. There are a couple of rules concerning the denominator so watch this video and find out what they are.
Curated OER
Why Can't You Divide By 0?
A mathematic impossibility? What? There's something you can't do in math? Yes! Believe it or not, you can't divide by zero! Watch this video and see the proof.
Curated OER
Dividing Integers
Clear up the confusion surrounding division of negative numbers with this short video. Viewers will learn how to determine if the answer to an integer problem is going to be negative or positive, and they'll witness the tutor work...
Khan Academy
MTEL Math Practice Test: 16-19
Providing quick lessons on lattice multiplication algorithms and inequalities, Sal takes viewers through problems 16-19 on the MTEL Practice Math Test. His calm and knowledgeable narration and easy-to-read annotations of each problem...
Curated OER
How Do Different Categories of Numbers Compare To Each Other?
The teacher defines and writes a list of the different categories of numbers. But sometimes it's hard to keep all that organized. So she draws a diagram and explains further how the categories of numbers compare or relate to each other....