Squaring Numbers In The Range 50-59 Mentally

In this post, we are going to learn how to square a number in the range 50-59, mentally.

Suppose that we want to find 52² (5 is our first digit and 2 is our second digit).  Here are the steps to be taken :

(a)   Square the second digit :

2² = 4

       So we write  04 (2 place values answer)

 

(b)   Add 25 to the second digit :

25 + 2 = 27

 

(c)   Attach that 04 to 27.

So 52² = 2704 

 

Let us look at another examples :

Example 1 :  Find 53 ².

(a)  3² = 9.  Remember it as 09.

(b)  25 + 3 = 28. 

(c)  Therefore,  53² = 2809

 

Example 2 :  Find 56².

(a)  6² = 36. 

(b)  25 + 6 = 31. 

(c)  Therefore, 56² = 3136

Just as simple as that.  But remember, this method is only for finding a square of a number in the range 50  to 59.

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Posted on June 12, 2009, in Info Matematik. Bookmark the permalink. 1 Comment.

  1. Nice make easier 2 solve question involving 50-59 square.. Ty!

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