Thursday 5 April 2012

Study Material for PSC exams Government Jobs: How to do multiplication in one line method

In P.S.C exams, there is enough number of maths question to make a difference in the final score. If you could score 100% in maths, then your chances goes up tremendously.
Traditional method of multiplication is too time consuming.






Let's look at other methods.

12  *
14
____

do   4*2 first step
do 4*1   +  1*2     second step

do  1*1            third step


you will get
    168




Next example


24*88

24
88
___

do 8*4
do 8*2    +  8*4
do 8*2





Third example


26
78
_______

do 8*6
do    8*2  + 7*6    
do  7*2

      ie 48 in the first step
place 8, and 4 is put aside


second step   16+ 42=58
plus 4 put aside in first step
58+4=62, here  place 2  and put aside 6

third step  gives 14
add 6 to 14=20
as this is the last step place the entire 20.

so the answer is

      8 in unit place
2 in tens place
and 20 in hundreds place

2028

answer is 2028.

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