Using Mental Math to Add and Subtract Videos - Free Educational Videos for Students in K - 12

Array

Lumos Video Store

This page provides a list of educational videos related to Using Mental Math to Add and Subtract. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Using Mental Math to Add and Subtract.


Addition & Subtraction of Mixed Numbers: With Same Denominators


By Red River College -Tutoring

Addition & Subtraction of Mixed Numbers: With Same Denominators

Understanding angle addition formulas


By Khan Academy

Sal proves the identity cos(x+y) = cos(x)*cos(y) - sin(x)*sin(y).

Understanding angle addition formulas


By Khan Academy

Sal proves the identity sin(x+y) = sin(x)*cos(y) + cos(x)*sin(y).

One-step addition and subtraction equations with fractions and decimals


By Khan Academy

Some quick examples to practice solving a variety of one step equations. All 4 operations (add, subtract, multiple, divide) are paired with variables.

One-step addition and subtraction equations with fractions and decimals


By Khan Academy

Learn how to solve one-step addition and subtraction equations that have fractions and decimals in them.

One-step addition and subtraction equations with fractions and decimals


By Khan Academy

Learn how to solve one-step addition and subtraction equations by adding or subtracting the same thing from both sides of the equation.

One-step addition and subtraction equations with fractions and decimals


By Khan Academy

Learn how to solve this equation: a + 5 = 54������������

Applying angle addition formulas


By Khan Academy

Sal finds the value of sin(7/12) by rewriting it as sin(/3+/4) and then using the sine angle addition formula.

Using Parenthesis in Math - Order of Operations - [5-7-3]


By Math and Science

Quality Math And Science Videos that feature step-by-step example problems!

06 - Graphing Parabolas - Shifting Vertically (Quadratic Functions)


By Math and Science

Quality Math And Science Videos that feature step-by-step example problems!

12 - The Factor Theorem, Part 1 (Factoring Polynomials in Algebra)


By Math and Science

Quality Math And Science Videos that feature step-by-step example problems!

12 - What are Inverse Functions? (Part 1) - Find the Inverse of a Function & Graph


By Math and Science

Quality Math And Science Videos that feature step-by-step example problems!