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How to multiply 346 by 17 in 2 secs

Debraj Paul
17/03/2017 0 0

Start with the right-most digit, 6. Multiply 7 with 6 and add the neighbor (none in this case, as 6 is the right-most digit). We get 42.  
Write down 2, and carry the 4. -----> 2


Move left to the next digit, 4. Multiply 7 with 4 to get 28, add the neighbor to right 6, to get 34, and add the carry 4, to get 38.

Write down the 8, and carry the 3. -----> 82


Move left to the next digit, 3. Multiply 7 with 3 to get 21. Add the neighbor, 4, and we get 25. Add the carry 3, to get 28.

Write down the 8, and carry the 2. -----> 882


Now add the carry 2 to the left most digit 3 which gives us 5. Finally, Write down 5. -----> 5882


So, our answer is 5882

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