Now let us see another simple form of vertically and crosswise method for numbers close to 100.This method will amuse you with its simplicity.
(a) For numbers below 100
Example 1 : 82 * 94
The above numbers are close to 100
82 is 18 below 100 and 94 is 6 below 100.
So,
82 +18
\/
/\
94 + 6
----------------
(82-6) or (94-18) / (6 * 18) ,now by multipying the right side and subracting the left side
76 / 108 ....76+1 / 08 ,by carrying over '1' since it is a two digit number
Therefore ,82 * 94 =7708
Example 2: 88 * 95
88 +12
95 + 5 ------> gives 100
-------------
(88-5)/(12 * 5)
83 / 60
Therefore, 88 * 95 =8360
(b) For numbers above 100
Example 1: 102 * 105
102 - 2
105 - 5 ........> gives 100
---------------
(105+2) / 5 * 2 ...here we have to add the opposite numbers
107/10
Therefore,102 * 105 =10710
Example 2: 111 * 108
111 - 11
108 - 8.......> gives 100
-------------
(111+8) / 11 * 8
119 /88
Therefore , 111 * 108 = 11988
More on Vertically and Crosswire along with the Grid Method
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