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Secrets of Mental Math (Kindle eBook) EXPIRED

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Amazon has Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks (Kindle eBook) on sale for $1.99. Thanks desijunkie

Google Play also has Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks (eBook) on sale for $1.99.

Barnes and Noble also has Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks (Nook eBook) on sale for $1.99.
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Edited February 2, 2018 at 09:49 AM by
Amazon.com has kindle edition of "Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks" for $2

https://www.amazon.com/dp/B000Q80...DAbMNK9JHD

Fakespot [fakespot.com] : B
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82 Helpful?
Also check out "Street-Fighting Mathematics" free textbook and the archived MooC from MIT.

Book [dropbox.com]
MIT makes it freely available.

MooC on edX [edx.org]
25 Helpful?
"2 plus 2 is four minus 1 that's 3. Quick maths."
25 Helpful?

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Boot's Theory
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#3
quickest way to determine a 20% tip is to just double the first two numbers, and put the decimal in teh most logical place
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#4
"2 plus 2 is four minus 1 that's 3. Quick maths."
Reply Helpful Comment? 28 3
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#5
Also check out "Street-Fighting Mathematics" free textbook and the archived MooC from MIT.

Book [dropbox.com]
MIT makes it freely available.

MooC on edX [edx.org]
Reply Helpful Comment? 25 0
This comment has been rated as unhelpful by Slickdeals users
Joined Aug 2005
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#6
Quote from MysteriousKarma
:
quickest way to determine a 20% tip is to just double the first two numbers, and put the decimal in teh most logical place
And as a true slickdealer don't tip on the tax!
Reply Helpful Comment? 28 4
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#7
Quote from desijunkie
:
Amazon.com has kindle edition of "Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks" for $2

https://www.amazon.com/dp/B000Q80...DAbMNK9JHD

Fakespot [fakespot.com] : B
Same price in Google Play Store [google.com] as well.
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#8
Quote from MysteriousKarma
:
quickest way to determine a 20% tip is to just double the first two numbers, and put the decimal in teh most logical place
or just move the decimal to the left one place and times by two?
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Our community has rated this post as helpful. If you agree, why not rep qwertpoi?
#9
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#10
A slick deal was posted for Uno cards at 11:45am. It takes 3 minutes to go frontpage. If each card costs $.02 and there are 100 card, why do I feel like I need to by Uno now?
Reply Helpful Comment? 12 0
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#11
Quote from MysteriousKarma
:
quickest way to determine a 20% tip is to just double the first two numbers, and put the decimal in teh most logical place
People who can't figure out how to calculate a 20% tip have needs that are beyond a book to solve...

I'd imagine the book goes a lot further than calculating tips...
Reply Helpful Comment? 17 4
Last edited by deal2deal February 3, 2018 at 08:28 AM.
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#12
Quote from deal2deal
:
People who can't figure out how to calculate a 20% tip have needs that are beyond a book to solve...

I'd imagine the book goes a lot further that calculating tips...

Laplace transformations using just your ears!
Reply Helpful Comment? 5 0
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#13
Quote from Ms.Calculated
:
And as a true slickdealer don't tip on the tax!
off topic but does anyone remove wine bottles/liquor bottles from tip equation and give standard tip on said service? Once heard that expensive bottles should merit the same tip as a cheap bottle given the same service.
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#14
Should I get this book for my elementary kids?
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#15
Quote from Ms.Calculated
:
And as a true slickdealer don't tip on the tax!
A TRUE slickdealer doesn't tip. How else am I supposed to get the meal I ordered? They won't let me back to the kitchen to go get it myself...

The price of the meal should include the cost of getting the meal to my table. Smilie
Reply Helpful Comment? 19 9
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