MinutePhysics
How to Subtract By Adding
Investigate the claim that 999997=-3. Learners discover how to subtract large numbers using a quick method of addition. The video provides examples and shows how adding machines and computers apply this approach to subtraction.
Corbett Maths
Adding Fractions Same Denominator
Adding fractions with a common denominator is no more difficult than adding whole numbers. Individuals watch a short video that shows examples of how to add fractions. The fractions have common denominators, which makes combining them a...
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Level 2 Addition
A video explaining addition of a two-digit number and a one-digit number using the addition algorithm, objects and number lines. Practice problems are available. [9:47]
Khan Academy
Khan Academy: Relate Place Value to Standard Algorithm for Multi Digit Addition
Transition from a place value chart to standard algorithm when adding multi-digit numbers.
Khan Academy
Khan Academy: Adding Decimals: 9.087 + 15.31
Demonstrates how to add the decimal numbers 9.087 + 15. 31 using the standard addition algorithm. [2:40]
Sophia Learning
Sophia: Dividing Two Digit Numbers by Two or Three Digit Numbers: Lesson 1
This video demonstrates division of two-digit numbers by two- or three-digit numbers. This lesson is 1 of 19 in the series titled "Dividing Two-Digit Numbers by Two or Three-Digit Numbers." Includes short multiple-choice quiz. [4:19]
Khan Academy
Khan Academy: Adding Decimals: 9.087+15.31
Sal solves 9.087+15.31 using the "standard algorithm". [2:40]
Khan Academy
Khan Academy: Adding Decimals: 0.822 + 5.65
Demonstrates how to add the decimal numbers 0.822 + 5.65 using the standard addition algorithm. [1:46]
Khan Academy
Khan Academy: Adding Multi Digit Numbers: 48,029+233,930
Add 48,029+233,930 using the standard algorithm.
Khan Academy
Khan Academy: Multiplying 3 Digit by 1 Digit (Regrouping)
Learn to multiply a 3-digit number by a 1-digit number using regrouping. In this video, we will multiply 7x253.