This short book is a collection of simple and easily grasped tricks to speed up your mental arithmetic. It pays to master them as they will enable you to do calculations in your head without error, as with written calculations.
Author: Yakov Perelman
Publisher:
ISBN: 291726098X
Category: Mathematics
Page: 18
View: 479
This short book is a collection of simple and easily grasped tricks to speed up your mental arithmetic. It pays to master them as they will enable you to do calculations in your head without error, as with written calculations.
More than once the assignment of condensing a book on math short cuts, for
publication in POPULAR SCIENCE, has come my way. ... Stop and think how rou
did it, and you'll find you have a versa- jle aid for mental figuring. ... Simple? Of
course. Now to apply it. This simple trick, only slightly varied, makes it easy to add
or sub- Continued Short-Cut Table on next two pages; text continued on page.
Author:
Publisher:
ISBN:
Category:
Page: 228
View: 673
Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.
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Author:
Publisher:
ISBN:
Category:
Page: 290
View: 576
Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.
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WHO NEEDS A CALCULATOR ? the units in the question , and 4x8 = 32 . so
remember 2 , and the 3 to carry . ... Small businessmen use them to put you off Mental Arithmetic , then you write down the answer to 471334 in a work out VAT ,
which might have ... about you ? look at some of the tricks and wheezes Ten Th .
4x3 + 3 = 15 Do you sincerely want to know the that make MA easy and
enjoyable .
10 15 2 32 and 203 in 1887 . ... when completed and executed with required by
his lamps , can calculate what his à freshly made - up bichromate , will ... + á
being common to both , the given that “ common thick blotting - paper " is in some
ment and test , and hold fast to what is true . ... bring his imagination into will be
funny cider if it is non - alcoholic . play , and simply write down what the result
ought S ... I still have the This makes the trick appear more wonderful still . on the
subject .
The Art of Quick Reckoning Karl Menninger. The proof ... This is a wonderful trick
, which can be used for an estimate : 73 x 75 75 x 75 = 752 = 5625 . ... It is
bewildering if done mentally : 1152 = 132 | 25 , or by $ 39 : 1652 = 27225 . ... The
general proof for any number ending in 5 goes like this , or very simply as a
special case of the formula of g 39 . ... T + 27 + 1 31 * = ( 9 x 100 ) + ( 2x 3 x 10 ) +
1 = 961 , which gives the RULE Between the square of the T ( 32 = 79
MULTIPLICATION $ 62.
Author: Karl Menninger
Publisher:
ISBN: UOM:39015037500835
Category: Ready-reckoners
Page: 132
View: 318
Examines the different roles played by church and state in considerations of religion throughout the history of the United States, beginning with concerns of the original colonists through the current debate about religion in schools.
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There were many such birds to - day , as the trap score type given below will
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Here is a very easy | bath of tepid water twice daily mid - forenoon and we hand
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Over 1,000 Tips, Tricks, and Techniques to Maximize Performance, Minimize
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Author: Jim Langley
Publisher: Rodale Books
ISBN: 1579540090
Category: Sports & Recreation
Page: 351
View: 947
Fix a broken chain with a shoelace! Improve shifter performance with dishwashing detergent! Inside are thousands of tips to repair and maintain any road or mountain bike. Whether it's the latest model or a classic that has thousands of miles on it, beginners or experienced riders can keep their bikes on the road longer and spend less time in the repair shop. With this ultimate repair manual: * Build a dream bike workshop with complete plans and comprehensive tool lists * Wow ride partners with tricks for fixing breakdowns with a minimum of tools * Roll wheel hoops and save time and money * Dial in suspension shocks for comfortable rides * Discover top tricks from professional mechanics * Expertly work on any style of brakes, including the V-Brake * Overhaul freewheels and cassettes for peak performance * Service clipless pedals for maximum safety What's new in the expanded and revised fourth edition? * Updated text that covers the latest models and parts * Over 160 new photos so you get repairs right the first time * Clearer, better designed captions so you can read as you repair * Troubleshooting sections to quickly identify and correct common problems * Web sites and phone numbers of bicycle and parts manufacturers * An updated glossary with the latest in bike lingo
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W HAT do you do with the fast W learners in your : arithmetic classes ? Mine like quick or trick ways to manipulate large numbers . I introduce one of the following
at a time , waiting until interest wanes before giving another . ' . ' If a pupil is not ...