More Lessons for Math Trivia
The following videos show some math tricks that will help you to do mental math to multiply numbers by 75, 101 or 111 quickly and efficiently.
Math Tricks: Multiply by 75
In this math video we take a look at an easy way to multiply numbers by 75.
Math Tricks: Multiply by 101
In this math tricks video we discuss an easy way to multiply numbers by 101.
When multiplying 101 by a two digit number, just write down the number twice
62 x 101 = 6262
42 x 101 = 4242
When multiplying by a three digit number by 101, first we want to add the first digit to the number
Example: To find 101 x 234
2 + 234 = 236
236 is the first three digits of the answer followed by the last two digits of the original number.
Answer: 101 x 234 = 23634
Math Tricks: Multiply by 111
In this video we look at an easy way to multiply numbers by 111.
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