Maths tips and tricks: Multiply two digit number by 11

Maths Tricks

Multiplication

◆Multiply two digit number by 11
 Follow the steps given below to learn this trick:

Step 1: Add both the digits of the number which has to be multiplied by 11.
Step 2: Place the result obtained by adding between the numbers.
Example 1.  45 × 11
• Add 4 and 5 .
4 + 5 = 9
•Then, place the result (9) between 4 and 5.
4_9_5
Now the final answer is 495.
Example 2.  36 × 11
• Add 3 and 6.
3 + 6 = 9
•Then, place the result (9) between 3 and 6.
3_9_6
Now the final answer is 396.
Example 3.  85 × 11
• Add 8 and 5 .
8 + 5 = 13
In a case when a two digit number is obtained by adding. Simply add the number at the tens place to first digit of the given number.
8 + 1 = 9
•Then, place the  3 between 9 and 5.
(8 + 1)__3__5 = 9__3__5 = 935
Now the final answer is 935.

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