Tuesday, 22 May 2012

column multiplication

Column multiplication can be done for solving the multiplication problems (read more on multiplication) which are  for the larger numbers. In order to learn column multiplication, we put the first number to  be multiplied in  one row and the number with which we need to multiply in another row. Now we will start picking one row after another from the ones place and each number of the row  of the multiplicand is multiplied with the multiplier. In case the product is greater than 9, then we will carry over the digit of the tens place and thus we get the result.
Let learn it with the help of an example :
If we have the problem : 3402 * 4, then we say that the multiplicand is 3402 and the multiplier is 4. The two numbers are placed under the  place values and so it looks as follows :
   Thousands           hundreds         tens         ones
        3                          4                   0              2
                                                      X                4
  12                                16             0              8
 Here each digit starting from the ones place is  multiplied by the  number 4, so we get 4 * 2 = 8 ,  4 * 0 = 0 ,  4 * 4 = 16 , 4 * 3 = 12
 Now in hundreds and in thousands place, we observe that the result is 16 and 12, which is in two digits, so we will carry over the digit “1 “ from 16 to the thousands place and thus the result will appear as follows :
   Thousands           hundreds         tens         ones
        3                          4                   0              2
                                                      X                4                                                                                                                                      
    13                         6                     0            8
In this way we will get the product of the two numbers by column method.
 To learn about  Area of a Circle Formula we have the online books and content available. AP secondary school education board  also has a good content for mathematics learning. In upcoming posts we will discuss about math tutor and How to perform Unit Conversions.

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