This is the fourth part of the Math and Multimedia’s Math Tricks and Shortcuts Series. In this post, I am going to discuss a shortcut on multiplying numbers by 13 (my aplogies to all the triskaidekaphobic). Well, I am not really sure if you would like to call it a shortcut since multiplying large numbers […]

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# Posts tagged with 'math trick'

## Math Trick 3: The Answer is Always 1089

This is the third part of the Math and Multimedia Math Trick Series. The first two tricks are multiplying by 11 and squaring numbers ending in 5. As I have promised, I will teach you more math tricks that will impress your friends. The most exciting part, however, is not actually the trick but why […]

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## Math Trick 2: Multiplying 2 Digit Numbers by 11

In the previous post, we learned a cool math trick on squaring numbers (positive integers) ending in 5. We did not only learn the math trick itself, but we also discussed why it works. In this post, we will explore another math trick which is multiplying 2 digit numbers by 11. The Copy-Add-Copy Method To […]

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