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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.

More Lessons for Math Trivia

Math Worksheets

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.

In this math video we take a look at an easy way to multiply numbers by 75.

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

In this video we look at an easy way to multiply numbers by 111.

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