These days we can perform toughest multiplications, addition, subtraction and other such calculations in less than a second using computer based calculating applications, but when these applications were not introduced, all these calculations were made with the help of a calculating device called abacus. This consisted of a box with bits and balls positioned in them. Actually, abacus is a kind of counting frame which makes you do calculations with the help of bits fixed in it. It can help you make addition, subtraction and even multiplication. Many of people are aware about how an abacus adds or subtracts, but only a few are aware about how it multiplies. Actually, an Abacus can help you in making multiplication of numbers larger than 9 and for this purpose you need to cram the tables coming before it.
How to Multiply Numbers using Abacus
1. Learn Multiplication Tables from 1 to 9:-
In order to learn multiplication with an abacus, you should first of all learn all the tables from 1 to 9. These tables will help you in multiplication process. If you are weak in multiplying, this might increase your problem as you may make a wrong combination of bits, but if you are perfect in multiplying till just nine, you can multiply even the numbers with more than two numbers of digits in between them.
2. Now Position the Bits in Columns:-
Start from the left most columns. Suppose you wish to multiply 23 by 11, you should assign the columns in such a way that 2, 3, blank, 1, 1, blank becomes the series of bits positioned from the left side. The first blank is the sign of multiplication and the second blank is the equal’s sign that we place while multiplying any two numbers for the product to be written after it. Blank means that all the bits will be left downside and while positioning the bits in other columns, we will position respectively the mentioned number of bits to the top side and the rest to the downside.
3. Finding the Product:-
Now you will multiply first column before the blank with the first column after the blank. Then you will multiply second column before the blank with the first column after the blank. Then the second column before the blank will be multiplied by second column before the blank and similarly for the rest of the numbers in your multiplication.
4. Record the Results:-
Now you have to keep on recording the products side by side. Suppose you multiply 2 with 1, their product should be recorded in the first column after the final blank left for product space. Similarly, you have to complete the entire multiplication and record it to the other side of the final product blank.
5. Count the Bits:-
The number of bits that you finally get after the product blank done this way is your multiplication product. If your multiplication was perfect, you will get 2, 5, 3 number if bits respectively after the product blank. If this is the product that you got, you have finally learnt the way to multiply on an abacus. Whenever you wish to multiply any two numbers, howsoever greater they may be, the same procedure should be followed.