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 Multi Digit Numbers: 48,029+233,930
Add 48,029+233,930 using the standard algorithm.