Multiplication Trick 3

Condition :  This trick is used when we multiply quickly two  numbers and a number is made by digit 9.

Example.  75×99 , 95×999 ,115×99 , 1259×999

Illustration 1 :   
175×999

Solution:         
1st part / 2nd part 

step 1→     175-1 /
step 2→     174    /   999-174
step 3→     174    /   825
Answer is 174825

Illustration 2 :   
258×99999

Solution:         
1st part / 2nd part 

step 1→     258-1 /
step 2→     257    /  99999-257
step 3→     257    /  99742

Answer is  25799742

Illustration 3 :   
564×99

Solution:         
1st part / 2nd part

step 1→     564-1          / No
step 2→     563             / No
step 3→     56399-563 / No

Answer is 55836

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