Multiply 99 by 98 in your head!
- Math Tricks
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I'm giving myself a challenge, i will post one cool new math trick every day for one month on this account! I've made the first math trick, how to multiply 99 by 98 (and other numbers close to 100) in your head, in 5-6 seconds.
http://hubpages.com/hub/Math-Tricks-Mul … -your-head
Check out my hub and let me know how i could improve it! I.e am I clear, should i add more examples, any gadgets i could add?Hah! awesome trick, I already knew it though
96- lorlie6
- 1116 posts
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I can't even do that on paper, for God's sake!
Read the hub, you'll be able to do it after for sure. lol
94- rebekahELLE
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yep, know that one, my sons taught me!
91- EYEAM4ANARCHY
- 631 posts
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Before I look, I'm guessing you multiply 99 by 100 and subtract 198.
- 91
- EYEAM4ANARCHY
- 631 posts
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I think my trick is easier. 8^D
- Math Tricks
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Eyeam,your trick is awesome! Try multiplying 89 * 92 though
. Gets a bit tougher! If you practise the trick in the hub you will begin doing those multiplications unconsiously! 8188 Btw ;DWhen/what are you doing your next trick about ?
- Math Tricks
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I haven't decided yet, do you think it should be another arithmetic trick or a cool puzzle!?
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:rolleyes: 
:cool: 
