Mental Addition and Subtraction Tips โ€” Math Tricks with Arthur Benjamin

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Published on ● Video Link: https://www.youtube.com/watch?v=Q2D8pp9lzgQ


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In this video, "Mathemagician" Arthur Benjamin demonstrates how to easily add and subtract one-, two-, and three-digit numbers in your head. He also teaches you shortcuts using the complement of a number (its distance from 100 or 1000) and demonstrates the uses of mental addition and subtraction for quickly counting calories and making change. If you like this video on mental math, check out all the other videos in our "Mental Math" playlist.

0:00 Intro
0:41 Adding One-Digit Numbers
1:40 Adding Two-Digit Numbers
5:10 Adding Three-Digit Numbers
11:20 Subtracting Two-Digit Numbers
14:50 Subtracting Three-Digit Numbers
18:23 Using Compliment Numbers
23:20 Using Three-Digit Compliment Numbers
25:00 Using Compliment Numbers to Make Change
28:43 Summary and Recap

Presented by Arthur Benjamin
Learn more about addition and subtraction at https://www.wondrium.com/youtube

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