PiNoY Posted November 29, 2011 Share Posted November 29, 2011 (edited) Here's a simple way on how to multiply 55 to itself faster? We know that 55 multiply to itself can be represented by the figure : 55 x 55 ==== 3025 The answer is 3025. NOW, any numbers being multiplied to itself like 55 times 55 , 75 times 75 , 35 times 35 or 25 times 25 , can have a faster answer being done from the mind. HOW?? For example? Taking 25 x 25 (25 times 25) can be taken AS 25 x 35 ===== 625 NOTICED that 2 multiply to 3 is 6 then simply append 25. You will get 625. The trick is to ADD 10 to the number then proceed with FIRST NUMBER multiplication. ANOTHER EXAMPLE for 55 multply to itself as in 55 x 55. 55 x 65 ==== 3025 NOTICED that 5 x 6 = 30 , so we append 25 to the number, the answer becomes 3025, which is the correct answer. Get it? Append 25 to 30 becomes 3025! So 55 times 55 equals 3025. Enjoy! Edited March 30, 2018 by Fearless Staff 1 Quote Link to comment Share on other sites More sharing options...
Panini*Hobbit@mp3 Posted November 29, 2011 Share Posted November 29, 2011 (edited) Nice tutorial. Simple, handy and easy to understand. +1 Edited November 29, 2011 by Panini*Hobbit@mp3 Quote Link to comment Share on other sites More sharing options...
Chuckun Posted November 29, 2011 Share Posted November 29, 2011 That's clever! I've never come across that method before I like it =] Quote Link to comment Share on other sites More sharing options...
Lo0n Posted November 29, 2011 Share Posted November 29, 2011 clever Quote Link to comment Share on other sites More sharing options...
Administrators JoeDirt Posted November 29, 2011 Administrators Share Posted November 29, 2011 I was thought this in grade 3 Quote Link to comment Share on other sites More sharing options...
Chuckun Posted November 29, 2011 Share Posted November 29, 2011 I was thought this in grade 3 I wish I was.. These kinda things were what made me love maths when I was in primary school (age 4-10/11).. Then in secondary school (age 11/12 - 16), we weren't taught any intriguing things like this.. Probably why I ended up hating maths, never going, and getting a B in my final exams lol (sounds ok but it was the lower end of my results) Quote Link to comment Share on other sites More sharing options...
tdkxeon Posted November 29, 2011 Share Posted November 29, 2011 i use booths algorithm 55 in binary is 00011011 other num is x00011011 -----> right shift this number 8 times and add to the number above for some reason i am addicted to binary language ! Quote Link to comment Share on other sites More sharing options...
Frated1 Posted November 29, 2011 Share Posted November 29, 2011 I knew this since 2nd Grade. But then again I knew the formula n/2(a1+an) too. Dang I was one smart kid. Still am. Quote Link to comment Share on other sites More sharing options...
yourfriend Posted November 29, 2011 Share Posted November 29, 2011 wow very cool. My schools didn't teach anything like this either, just the good ol' multiplication tables and brute force practice, good times. Quote Link to comment Share on other sites More sharing options...
**MrDeaTh. Posted November 29, 2011 Share Posted November 29, 2011 Wow cool , Thanks, Have fun !! Quote Link to comment Share on other sites More sharing options...
PiNoY Posted November 29, 2011 Author Share Posted November 29, 2011 thank you guys for the likes and rating Quote Link to comment Share on other sites More sharing options...
tdkxeon Posted November 29, 2011 Share Posted November 29, 2011 I knew this since 2nd Grade. But then again I knew the formula n/2(a1+an) too. Dang I was one smart kid. Still am. i knew that before i was born ! Quote Link to comment Share on other sites More sharing options...
IAmAChristian Posted November 29, 2011 Share Posted November 29, 2011 I get it now, hah. Nifty. Quote Link to comment Share on other sites More sharing options...
Waster Posted November 29, 2011 Share Posted November 29, 2011 Bet that those who learned this in school arent in the US... Good Tutorial Thanks! Quote Link to comment Share on other sites More sharing options...
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