Sunday, 7 January 2018

Easy trick to Multiply Three and Two digit numbers !!


Example 1 : 295 * 18


Step 1: 

Multiply 5 * 8 = 40 (note down 0 and carry 4).

= 0

Step 2: 

Then do cross multiplication and add carry

( ( 9 * 8 ) + ( 5 * 1 ) + 4 ) = 72 + 5 + 4

= 81 (note down 1 and carry 8)

= 1

Step 3: 

Again do cross multiplication and add carry 

( ( 2 * 8 ) + ( 1 * 9 ) + 8 ) = 16 + 9 + 8 

= 33 (note down 3 and carry 3).

= 3 

Step 4: 

Now multiply of left numbers and add carry

( ( 2 * 1 ) + 3 ) = 5

Finally we get the result is 5310

Example 2 : 302 * 29


Step 1: 

Multiply 2 * 9 = 18 (note down 8 and carry 1).

= 8

Step 2: 

Then do cross multiplication and add carry

( ( 2 * 2 ) + ( 0 * 9 ) + 1 ) = 4 + 0 + 1

= 5 

Step 3: 

Again do cross multiplication

( ( 3 * 9 ) + ( 0 * 2 ) ) = 27 + 0

= 27 (note down 7 and carry 2).

= 7

Step 4: 

Now multiply of left numbers and add carry

( ( 3 * 2 ) + 2 ) = 6 + 2

= 8 

Finally we get the result is 8758

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Easy trick to Multiply Three and Two digit numbers !! Rating: 4.5 Diposkan Oleh: Alao