Matemàtiques avançades: ARITMÈTICA DEL RELLOTGE

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martes, 6 de diciembre de 2011

ARITMÈTICA DEL RELLOTGE

En un rellotge, si són les 7 i passen 8 hores, quin hora serà? Seran les 3. Per a indicar aquesta situació escriurem:
7 + 8 = 13
13 és congruent a 1 (mòdul 12) ~~~> set més huit és congruent amb 3 mòdul 12

Com en un rellotge hi han 12 hores utilitzarem els números 0,1,2,3,4,5,6,7,8,9,10 i 11.
12 és congruent a 0 (mòdul 12)
En un rellotge dos números (a i b) són congruents (mòdul 12) si representen la mateixa hora.

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martes, 6 de diciembre de 2011

ARITMÈTICA DEL RELLOTGE

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