Trachtenberg Speed System of Basic Mathematics

Do high-speed, complicated arithmetic in your head using the Trachtenberg Speed System. n n 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. n n Jakow Trachtenberg believed that everyone is born with phenomenal abilities to calculate. He devised a set of rules that allows ev…

Compară ofertele (1)

Ofertele sunt ordonate după preț, de la cel mai mic. Linkurile către magazine pot fi afiliate; comisionul nu schimbă ordinea. Cum ordonăm rezultatele

Momentan o singură ofertă pentru acest produs — adăugăm magazine noi constant.