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Recent tips and tricks added to solve mathematical problems in a quick way.
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1. Multiplication of 12...

1. 93*125 = 93000/8 = 11625. 2. 137*125 = 137000/8 = 17125. example 3786*125 = 3786000/.....
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2. Calculate a Tip...

If you need to leave a 15% tip, here is the easy way to do it. Work out 10% (divide the nu.....
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3. Subtracting from 100...

To subtract a large number from 1,000, subtract all but the last number from 9, then subtr.....
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4. Multiplying by 12...

Just like the previous trick, you can multiply any number by 12 very quickly and easily. L.....
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5. Multiplying by 11...

Sure, multiplying a one-digit number by 11 is a cinch. 4 x 11 = 44 7 x 11 = 77 But .....
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6. Multiplying by 4...

This trick is so simple and logical, it almost shouldn't be called a trick. But it could c.....
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7. Multiplication of an...

13*19 = (13+9)*10 + (3*9) = 220 + 27 = 247 Means add first number and last digit of the s.....
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8. Cubing...

To quickly cube a two-digit number in your head, it is worth learning how to multiply two.....
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9. Squaring...

Aitken took advantage of the following algebraic identity. A2 = (A ?€€€ d).....
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10. Division by 5...

Often, instead of dividing by 5, it is more convenient to multiply first by 2 and then div.....
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