Bringing the Khan Academy SAT video series to an end, Sal uses The Official SAT Study Guide to complete the final 16 problems (page 867). In this video, he solves problems 1-7 quickly and proficiently.

Sal tackles pre-algebra in this series of videos, starting with the concept of negative numbers. Using a number line, he takes the viewer through different practical examples of negative numbers, such as temperature and bank accounts....

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.

A new SAT practice session (from page 669 of The Official SAT Study Guide) begins with problems 1-5. Sal demonstrates quick thinking and contemplative problem solving as he moves efficiently from one equation to the next.

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.

Subtracting an integer is as simple as adding the opposite value. Watch this video to see an example of how to change the signs and then add the two integers.

Help your learners grasp inequalities with this video. A lecturer leads viewers through solving an inequality by multiplying by a negative number, citing the multiplication property of inequality and finishing with set notation. This is...

With an enthusiastic instructor who writes clear steps on a whiteboard, this video demonstrates how to solve an inequality by dividing by a negative number. What makes this video stronger is the second part of the video, in which the...

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...

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...

Subtract a positive number from a negative number. Switch the signs, add the terms, use absolute value, but leave the first negative outside. Confusing? Watch the instructor explain the steps to learn this method.

Mrs. Jenkins has five children. How old is each one of them? A big word problem with lots of numbers to figure out. Show this video to your class! The more exposure your learners have to word problems, the more comfortable they will be...

If you already know how to add integers, you're only one step away from knowing how to subtract. Scholars learn to subtract integers using multiple methods. First, the brief YouTube video describes how to subtract integers by adding the...

There are times when you might want to use a number line to help you visually understand what is happening mathematically. Subtracting integers might be one of those times. So take a look and see which direction you need to move on the...

With an enthusiastic instructor who writes clear steps on a whiteboard, this video demonstrates how to solve an inequality by dividing by a negative number. What makes this video stronger is the second part of the video, in which the...

A collective groan can be heard when long division is mentioned. Here's a step-by-step demonstration of how to divide a two digit number by a one digit number, with a remainder.

Break down integers with this video. A teacher gives a basic definition and provides several examples of integers. The examples cover numbers that are integers as well as numbers that are not integers. A concise video, this resource...

Simply put, a prime number is a number that is divisible only by one and itself. All other numbers are composite.

The problems are getting a little more difficult in this video, which covers problems 13-16 on page 778, but Sal is still easy to understand. He demonstrates various strategies for solving algebraic expressions and problems involving...

Transitioning between algebra and geometry is no problem for Sal as he deftly solves these practice SAT problems. Mathematicians who have a hard time moving between skill sets will appreciate the way that Sal addresses each new problem...

Problems 7-11, which involve both geometry and algebra problems, allow students to practice transitioning between skills. Sal takes time to explain the process of each problem so that students will understand the test strategies as well...

Break down integers with this video. A teacher gives a basic definition and provides several examples of integers. The examples cover numbers that are integers as well as numbers that are not integers. A concise video, this resource...

Solve this real world word problem in just one written step. The original inequality is a division problem, so to solve it, use the multiplication property of inequality. Was the problem solved by multiplying a negative number? Yes! So...

Simply put, a prime number is a number that is divisible only by one and itself. All other numbers are composite.