Fastmaths will help you to
> Solve mathematical Problems 10 - 15 times faster> Improve your intelligence
> Reduce burden [ Need to learn multiplication table up to 5 only ]
> Increase concentration
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Example 1 : Finding Square of a number ending with 5 To find the square of 75 Do the following Multiply 5 by 5 and put 25 as your right part of answer. Multiply 7 with the next higher digit ie (7+1)=8 gives 56 as the left part of the answer, Answer is 5625 |
Example 2 Calculate 43 X 47 The answer is 2021 Same theory worked here too. The above 'rule' works when you multiply 2 numbers with units digits add up to 10 and tenth place same Example 3 : 52 X 58 = 3016 How long this take ? |
Example 4: Multiply 52 X 11 Answer is 572 Write down the number being multiplied and put the total of the digits between 2 digits 52 X 11 is [ 5 and 5+2=7 and 2 ] , answer is 572 Can you find the following within less than a minute? a) 1001/13 ? b) 1/19 ? |