Curated Video
Circles and Circumference
This video lesson will review key vocabulary terms about circles and finding circumference of circles and semicircles. Students will learn how to describe a circle in terms of radius and diameter, understand the concept of pi, and find...
Curated Video
Dividing Four Digit Numbers by Two Digit Numbers Using Long Division
In this video, the teacher explains how to divide a four-digit number by a two-digit number using long division. The concept of multiplication and division as inverse operations is introduced, and the distributive property is used to...
Curated Video
Using Real World Percent to Solve a Problem
In this short video we will answer a standardized math test question where we are asked to solve a multi-step percent problem. We will first draw a picture to understand the problem. We will find the percent of a number. We will then...
Curated Video
Representing Fractions as Percents: Renaming with 100 in the Denominator
In this video, the teacher explains how to represent common fractions as percents by renaming them as equivalent fractions with 100 in the denominator. The teacher uses mental math and a money analogy to help students understand the...
Curated Video
Adding and Subtracting Money Using Mental Math
In this video, students learn how to add and subtract money using mental math. They practice skip counting to find the total amount and calculate change. The video emphasizes the importance of understanding that change should be less...
Corbett Maths
Percentages: Of an Amount (Non-Calc)
Know these four and be fine. Scholars learn how to calculate any percentage, all by knowing four easily calculated percents. Two worksheets provide opportunities for learners to refine their skills.
PhysEdGames
Mental Math Warm-Up
Use a simple warm-up that has pupils solving math equations to determine the number of reps for a certain exercise. Learners use mental math to solve basic equations. Next, they must do the same number reps of whatever exercise...
PhysEdGames
Line Math
Call out an equation and have team members walk, run, or jog to the answer in a line. Then, the next player in line goes. This non-competitive game is good for reinforcing math skills that have answers under 10.
Curated OER
How Do You Mentally Find Percents That are Powers of 10?
Powers of 10 are about moving the decimal around. The instructor illustrates how to move the decimal when it's ten percent or it's one percent. Once you understand this procedure you can do the mental math, in your head of course!
Curated OER
Multiplying 2 Digit Numbers Mentally
Have your class multiply two-digit numbers using mental math. This video goes through a step-by-step explanation of this process. You could have learners explain this process to a partner to make sure they understand the procedure.
Curated OER
How Do You Mentally Find Percents That are Powers of 10?
Powers of 10 are about moving the decimal around. The instructor illustrates how to move the decimal when it's ten percent or it's one percent. Once you understand this procedure you can do the mental math, in your head of course!
Curated OER
Secret Trick: Math Division Long
Upper graders and middle schoolers will love this clip. They'll learn how to divide large numbers mentally. The narrator uses addition (and what appears to be magic) to divide a six-digit number by a single-digit number. Really cool...
Khan Academy
Khan Academy: Solving 3 Digit Addition in Your Head
Sal shows some techniques for doing mental addition, such as making groups of 10 and 100. Includes a video, transcript, and question and answer section. [7:27]
PBS
Pbs Learning Media: Move That Math
Calculate the sum of the two cards on the screen to find out how many repetitions of each exercise to do. Then exercise along with the kids in the video to improve your mental math skills and fitness level at the same time. [5:34]
Math Mammoth
Math Mammoth: Percent of a Number
See how you can use mental math to find the percent of a number by first determining 1% or 10% of the number. [7:04]
Virtual Nerd
Virtual Nerd: How Do You Mentally Find Percents That Are Powers of 10?
This tutorial explains how to calculate percents that are powers of 10. [2:59]
Virtual Nerd
Virtual Nerd: How Do You Estimate a Multiplication Problem by Rounding?
This tutorial demonstrates how to estimate the answer to a word problem by multiplying mentally. [3:27]
Khan Academy
Khan Academy: Alternate Mental Subtraction Method
This video shows a mental math strategy for subtracting numbers.
Khan Academy
Khan Academy: Multi Digit Multiplication: Example: Two Digit Multiplication
This video shows how to round and then multiply two numbers in the context of solving a real-world problem.
Math Mammoth
Math Mammoth: Mental Addition of Two Digit Numbers
This video explains some strategies that are helpful for adding two-digit numbers in your head. [8:00]
Imagine Learning Classroom
Learn Zillion: Adding and Subtracting Using Doubles Facts
In this lesson, you will learn to add and subtract by using doubles. [3:42]
Homeschool Math
Homeschool Math: Dividing Fractions by Whole Numbers
This video lesson teaches how to divide fractions by whole numbers (sharing divisions) using mental math.