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The Trachtenberg Speed System of Basic Mathematics
Engelsk
Bogcover for The Trachtenberg Speed System of Basic Mathematics af Jakow Trachtenberg, 9780285629165
Specifikationer
Sprog:
Engelsk
Sider:
272
ISBN-13:
9780285629165
Indbinding:
Paperback
ISBN-10:
0285629166
Kategori:
Udg. Dato:
29 jun 1989
Størrelse i cm:
19,4 x 12,3 x 1,8
Oplagsdato:
29 jun 1989
Forfatter(e):

The Trachtenberg Speed System of Basic Mathematics

Engelsk
Paperback 1989
Format:

Bog beskrivelse
Do high-speed, complicated arithmetic in your head using the Trachtenberg Speed System.Ever find yourself struggling to check a bill or a payslip? With The Trachtenberg Speed System you can. Described as the ''shorthand of mathematics'', the Trachtenberg system only requires the ability to count from one to eleven. Using a series of simplified keys it allows anyone to master calculations, giving greater speed, ease in handling numbers and increased accuracy.Jakow Trachtenberg believed that everyone is born with phenomenal abilities to calculate. He devised a set of rules that allows every child to make multiplication, division, addition, subtraction and square-root calculations with unerring accuracy and at remarkable speed. It is the perfect way to gain confidence with numbers.
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Specifikationer
Sprog:
Engelsk
Sider:
272
ISBN-13:
9780285629165
Indbinding:
Paperback
ISBN-10:
0285629166
Kategori:
Udg. Dato:
29 jun 1989
Størrelse i cm:
19,4 x 12,3 x 1,8
Oplagsdato:
29 jun 1989
Forfatter(e):
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