In the series of providing quantitative shortcuts and tricks, today I come up with multiplication trick.
In case you find any difficulty to understand the above multiplication method then ask your question in the comments. I will try to answer every query asap.
While doing multiplication of a two digit number with another two digit number, we take at least 6 steps. Try yourself. Multiply 62 with 32.
Now let's do this with a trick
Step 1
First step is same as the conventional method, here we multiply 2 with 2.
![multiplication trick multiplication shortcut step 1](https://4.bp.blogspot.com/-OzGoltGFetg/UhL4J6e67zI/AAAAAAAAAoY/tReZ_3lqs6M/s1600-rw/multiply-2.jpg)
Step 2
This is an interesting step. Now multiply last digit first value and first digit of second value and vice-versa. Then we add outcomes. But we need the last number that is 8 here.
![multiplication trick step 2 multiplication shortcut step 2](https://1.bp.blogspot.com/-00TpKfjnJjY/UhL4KPRhBFI/AAAAAAAAAoc/g9OT-wYIGgE/s1600-rw/multiply-4.jpg)
Step 3
This is the last step, in this step we do multiplication ten's digit of both value and add the remainder from previous calculation. That's it, we completed the calculation in 3 steps instead of six steps.
![multiplication trick step 3 multiplication shortcut step 2](https://3.bp.blogspot.com/-riRtzg2BV14/UhL4KIRNHNI/AAAAAAAAAoo/DClAXnn_x10/s1600-rw/multiply-6.jpg)
We can use this method for multiplication of three or even four-digit numbers but time management is really important in IBPS exam and other recruitment exams so, for longer calculations, estimation is the best trick. I will post an article about how to do long calculations using estimation and result is 95% accurate which is enough to arrive at the answer.
Update 06-09-2013
As two of the readers namely Rahul and Ansh have requested me to use this technique in longer calculations multiplications. I am updating this article.
Update 06-09-2013
As two of the readers namely Rahul and Ansh have requested me to use this technique in longer calculations multiplications. I am updating this article.
Multiplication of 3 digit numbers
In this example I will multiply 432 with 346. Now the 3 step multiplication method will become 5 step. This method can be used for 4 and even 5 digit numbers but as in bank exams there is lack of time available for calculations I recommend you to use the approximation for long calculations.
Step 1
![multiplication trick 3 step multiplication trick 3 step](https://2.bp.blogspot.com/-3YRSl4TsRu8/Uil5cPOwrFI/AAAAAAAAArI/can2YpzmOnM/s1600-rw/multiplythree2.jpg)
Step 2
![multiplication trick step 2 multiplication trick step 2](https://2.bp.blogspot.com/-nP89asw0Rec/Uil5cfCG4wI/AAAAAAAAArM/dnbbzoszObU/s1600-rw/multiplythree3.jpg)
Step 3
![multiplication trick step 3 multiplication trick step 3](https://2.bp.blogspot.com/-kGgda3sMYEA/Uil5cX14dLI/AAAAAAAAArU/THrW1TfqHv0/s1600-rw/multiplythree4.jpg)
Step 4
![multiplication trick step 4 multiplication trick step 4](https://1.bp.blogspot.com/-mYMj61pOgys/Uil5c4ZShkI/AAAAAAAAArk/BYUUAnMjgII/s1600-rw/multiplythree5.jpg)
Step 5
![multiplication trick step 5 multiplication trick step 5](https://1.bp.blogspot.com/-BtgYxO2lYU8/Uil5dKybQrI/AAAAAAAAArg/cxyZjuBj7I8/s1600-rw/multiplythree7.jpg)
Further, read 10 Maths Tricks here