Simple Tricks to multiply
- Multiply by 5: Multiply by 10 and divide by 2.
- Multiply by 6: Sometimes multiplying by 3 and then 2 is easy.
- Multiply by 9: Multiply by 10 and subtract the original number.
- Multiply by 12: Multiply by 10 and add twice the original number.
- Multiply by 13: Multiply by 3 and add 10 times original number.
- Multiply by 14: Multiply by 7 and then multiply by 2
- Multiply by 15: Multiply by 10 and add 5 times the original number, as above.
- Multiply by 16: You can double four times,if you want to. Or you can multiply by 8 and then by 2.
- Multiply by 17: Multiply by 7 and add 10 times original number.
- Multiply by 18: Multiply by 20 and subtract twice the original number (which is obvious from the first step).
- Multiply by 19: Multiply by 20 and subtract the original number.
- Multiply by 24: Multiply by 8 and then multiply by 3.
- Multiply by 27: Multiply by 30 and subtract 3 times the original number (which is obvious from the first step).
- Multiply by 45: Multiply by 50 and subtract 5 times the original number (which is obvious from the first step).
- Multiply by 90: Multiply by 9 (as above) and put a zero on the right.
- Multiply by 98: Multiply by 100 and subtract twice the original number.
- Multiply by 99: Multiply by 100 and subtract the original number.
Notes
Vedic Maths - Notes
3. Likewise you can find out square of a number that is one less than the number whose square is known
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4. Multiplying two 2 digit numbers difference of 4
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5. Multiplying two selected 3 digit numbers middle digit 0
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8. Multiplying two 2 digit numbers difference of 6
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9. Square 2 Digit Number with up down Method
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10. Squaring a 2 digit number ending in 5
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11. The Squaring of Numbers Ending in 5
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13. Multiply any two digit number with 11
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14. Multiplying two selected 3 digit numbers middle digit 1
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16. Squaring a 2 digit number ending in 3
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19. Squaring a 2 digit number ending in 2
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20. Squaring a 2digit number ending in 8
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21. Digital Sums For Multiplication By Eleven
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22. Multiplying two 2 digit numbers same 2nd digit
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23. Multiplying two 2 digit numbers difference of 3
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25. Multiplication of two numbers around 100 is even easier than you could ever imagine
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26. Squaring a 2 digit number beginning with 1
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27. find square of a number between 50 and 60
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28. Multiplying two 2 digit numbers difference of 1
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30. Squaring a 2 digit number ending in 4
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31. Multiplying two 2 digit numbers same 1st digit 2nd digits sum to 10
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33. Lets add 1 hr and 35 minutes and 3 hr 55 minutes together
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35. Multiply any two numbers from 11 to 20 in your head Take 15 x 13
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37. Squaring a 2 digit number beginning with 9
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38. Multiplying two 2 digit numbers difference of 2
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39. Vertically and Crosswise To find 26 Multiplied by 31 in One Line we need to look at a Pattern
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41. This little math trick will show you whether a number is divisible by four or not
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42. Multiplying two 2 digit numbers difference of 8
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45. Squaring a 2 digit number ending in 6
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47. Multiplying two 2 digit numbers difference of 10
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49. How to multiply 123 and 321 in one go
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50. Squaring a 2 digit number ending in 7
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