Monday, 24 April 2017

Calculation Tricks IX –Multiply Two Digit Numbers using Multiplication techniques

The need to multiply two digit numbers is something that is needed in more than half the questions in the Quantitative Aptitude section of SBI PO, SSC CGL and IBPS Exams. Read on as we discuss multiplication techniques that can be used to multiply any two digit numbers.

multiply two digit numbers
SBI PO, IBPS, SSC Exam, Insurance Exams, Railway RecruitmentBoard Exams… No matter which exam you are preparing for and planning to write, multiplication techniques is a basic need in all competitive exams.  We all know every time you have to multiply two digit numbers, it can be quite difficult and time consuming because the only difference between candidates who get selected and candidates who don’t get selected is use of smart methods to solve problems.
So to solve this problem for you we have the 9th blog post in this series which will help you multiply two digit numbers.
multiply two digit numbers

 Why do you Need Calculation Tricks?

One skill that every competitive exam aspirant should have is swift and accurate calculations skills since this scan save you a lot of valuable time in any exam! The expertise in being able to multiply two digit numbers can be very useful and help you get closer to the cut off, because you never have to multiply two digit numbers for a questions, but only to move to the next step of the question!
A Question where Multiplication Techniques help to Multiply two Digit Numbers
89 x 64 = ?
1) 5596      2) 5696      3) 6596      4) 6696      5) None of these

Conventional Method to Multiply two Digit Numbers

So what is your basic instinct on reading a step like this in a question? You pick up a pen and paper and multiply 89 with 64 using the regular method where 9 is first multiplied with 4, you write the units value and carry forward the tens value and you continue doing the same till you finish multiplying with 4. Then you repeat this entire process with 6 and finally you add the two to get the answer.
multiply two digit numbers
This method involves paperwork and requires 10- 12 seconds!

Smart Method to Multiply two Digit Numbers

This multiplication technique has a three stepped approach to multiply two digit numbers.
Step 1:
The first thing you have to do is multiply the two numbers in the units place. In this case you multiply 9 with 4 and get 36. You write 6 and carry forward 3.
Multiply two digit numbers
Step 2:
The second thing to do is, cross multiply the units places with tens places and add the two numbers. In this case multiply 9 with 6 and 8 with 4. You get 54 and 32 respectively. Add in the two you get 86, now add the carry forwarded 3, eventually you get 89. Write 9 and carry forward the 8.
multiply two digit numbers
Step 3:
The last step in multiplying two digit numbers is to multiply the two numbers in the tens place. In case 8 and 6 and add the carry forwarded number, you get 56.
Multiply two digit numbers
Fast and Easy! Just how calculations should be!

Why don’t you try to multiply the following numbers using this trick?
Question 1: 23 x 98 = ?
1) 2254      2) 2444      3) 2554      4) 2544     5) None of these

Question 2: 67 x 58 = ?
1) 3996      2) 3866      3) 3386      4) 3886      5) None of these

Do tell us in the comments section below how helpful this method was! 
And don’t forget t use these multiplication techniques when you multiply two digit numbers.
multiply two digit numbers

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