virendra
25th September 2006, 07:37 PM
Finding product of 2 digit numbers :
Lets multiply 29 by 78 (29*78)..
Step 1: First multiply the last digits and write the units digit of this product as unit digit of the final result , i.e. , 9*8=72. Hence, 2 is units digit of the final result and 7 is the carry.
Step 2: Now cross multiply , i.e. , multiply 2 by 8 (2*8) , and 9 by 7 (9*7) . Add the results and also the carry (7) , i.e., 7+63+16=86. write units digit of the sum (86) in tens place of the result , i.e., 6 in ten's place and 8 is the carry.
Step 3: Now Finally, multiply the first digits of the two numbers , add the carry to the product and write the result as the first digit(s) of final result , i.e. , 2*7=14 and add 8 i.e. , 14+8= 22.
Therefore 29 * 78= 2262.
The application for practice is in the attached file.
Using MULTIPLY.EXE:
_________________________________________
Multiply.exe is the simplest one, and has a colour interface too. Be ready for calculations , Bcause as U invoke the application, it starts by askin you the first question.
Now the most important part:
you must have noticed that in the above shortcut method , the answer is obtained from right to left, thus keeping this in mind this application has been made to take inputs from right to left, against in all other applications that you've been using. Like if the answer is 1549, you've to first type 9, then 4 , then 5 & finally 1, same way as they r obtained through the method. I will make it more simple. if u've to type 14 first type 4 then 1. (Not 1 and then 4).
Here if you want to escape and go to your results, just press 'Escape' key, and the last question and the time consumed in that question will be ignored. This key works even in the middle of calculations!
Rest's all same ; if the answer's wrong it gives you the right answer, without counting that time & the format of the result is also same as in ADD.EXE & SUB.EXE. Pressing any key after the results will terminate the program.
_________________________________________
Hope this little program could help you.
Happy calculations!!
Lets multiply 29 by 78 (29*78)..
Step 1: First multiply the last digits and write the units digit of this product as unit digit of the final result , i.e. , 9*8=72. Hence, 2 is units digit of the final result and 7 is the carry.
Step 2: Now cross multiply , i.e. , multiply 2 by 8 (2*8) , and 9 by 7 (9*7) . Add the results and also the carry (7) , i.e., 7+63+16=86. write units digit of the sum (86) in tens place of the result , i.e., 6 in ten's place and 8 is the carry.
Step 3: Now Finally, multiply the first digits of the two numbers , add the carry to the product and write the result as the first digit(s) of final result , i.e. , 2*7=14 and add 8 i.e. , 14+8= 22.
Therefore 29 * 78= 2262.
The application for practice is in the attached file.
Using MULTIPLY.EXE:
_________________________________________
Multiply.exe is the simplest one, and has a colour interface too. Be ready for calculations , Bcause as U invoke the application, it starts by askin you the first question.
Now the most important part:
you must have noticed that in the above shortcut method , the answer is obtained from right to left, thus keeping this in mind this application has been made to take inputs from right to left, against in all other applications that you've been using. Like if the answer is 1549, you've to first type 9, then 4 , then 5 & finally 1, same way as they r obtained through the method. I will make it more simple. if u've to type 14 first type 4 then 1. (Not 1 and then 4).
Here if you want to escape and go to your results, just press 'Escape' key, and the last question and the time consumed in that question will be ignored. This key works even in the middle of calculations!
Rest's all same ; if the answer's wrong it gives you the right answer, without counting that time & the format of the result is also same as in ADD.EXE & SUB.EXE. Pressing any key after the results will terminate the program.
_________________________________________
Hope this little program could help you.
Happy calculations!!