Skip to main content

Multiplication Trick 7


1. Condition :  This trick is used when we multiply quickly two numbers of two digits.
Example.  21×59, 89×96 etc.

Illustration 1:                                                                                                              



     Illustration 2



Note : 2nd and 3rd part have only 1 digit. 



Try Now :
1.  42×36
2.  25×93
3.  84×87
4.  32×95
5.  43×74


Comments

Post a Comment

Popular posts from this blog

Complement of a Number

Subtraction of Binary Numbers  ;  Octal and Hexadecimal Number  ;  Convert Decimal to Binary Complements Complements are used in digital computers for simplifying the subtraction operation and for logical manipulations. There are two types of complements for each base-r system: (1) the r’s complement and (2) the (r-1)’s complement. When the value of the base is substituted, the two types receive the names 2’s and 1’s complement for binary numbers,  10’s and 9’s complement for decimal numbers. The r’s Complement Given a positive number N in base r with an integer part of n digits, the r’s complement of N is defined as r n   - N for N is not equal to 0 and 0 for N = 0. The following numerical example will help clarify the definition. The 10’s complement of (52520) 10 is 10 5 – 52520 = 47480 The number of digits in the number is n= 5 The 10’s complement of (0.3267) 10 is 1 – 0.3267 = 0.6733 No integer part, so 10 n = 10 0 = 1 The 10’s...
Post a Comment
Read more

Rules of divisibility part -1

Rules of divisibility In Vedic mathematics, it can be determined whether any part of any other number can be given completely without dividing it by several methods. These methods are based on the law of divisibility. By using these rules, calculations related to factors, parts etc. are simplified. Law of divisibility by number 2 :- If unit digit of given number is divisible by 2 then the given number is divisible by 2 also.                                                                 or  If unit digit of given number is 0,2,4,6 or 8 , then given number is divisible by 2. Example :- 10 ,32 ,74 ,108 ,2058 etc. Law of divisibility by number 3 :- If the sum of digits of given number is divisible by 3, then the number is divisible by 3 also. Illustration 1:-  In 546532 sum of digits=5+4+6+5+3+2=25 25 is not divisible...
2 comments
Read more
WORLD  HERITAGE  SITES IN  INDIA PART- 1  Why did UNESCO start the World Heritage Centre? The UNESCO World Heritage Centre was born by merging two separate movements. The first was a movement for the preservation of cultural sites. The second was a movement that dealt with the conservation of nature. The ball for the first movement was set rolling with the decision to build the Aswan High Dam in Egypt. This dam would have flooded the valley in which one of the treasures of ancient Egypt- the Abu Simbel temple- wsa located. In 1959 UNESCO launched a campaign to safeguard these temples. It was a joint effort of 50 countries, and it led to many other similar projects to safeguard rare treasures. It was the United States that led the movement to combine the conservation of natural wonders along with cultural sites.  World Heritage Fund- If 1972, the World Heritage Fund was created. Its aim is to assist nations in identifying, preserving, and promoting World Heritage...
Post a Comment
Read more