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Notação Científica Profª Roselene
O que é Notação Científica?     Notação Científica é uma forma breve de representar números em especial grandes ou muitos pequenos,com o auxílio de potências de 10.        São números  usados em   anotações científicas.
Por exemplo, a maior distância observável do universo mede cerca de 740 000 000 000 000 000 000 000 000 metros, e a massa de um próton é aproximadamente 0,00000000000000000000000000167 gramas.
O segredo é multiplicar um número por uma potência de 10. Vejamos alguns exemplos: · 200 = 2 x 100 = 2 x102 · 5.300.000 = 5,3 x 1.000.000 = 5,3 x 106 · 0,00000024 = 2,4 x 0,0000001 = 2,4 x 10-7 Potências de 10         positivas - para números grandes                                       negativas - para números pequenos
Expoente Positivo - indica que iremos "aumentar" o número de zeros à direita ou "movimentar" para direita a vírgula tantas casas quanto indicar o expoente da base 10.  33 x 105 = 3300000 ( acrescentamos 5 zeros à     direita) 0,00011 x 104 = 1,1 ( "Movimentamos" a vírgula 4 casas para direita)  0,000032 x 103 = 0,032 ("Movimentamos" a vírgula 3 casas para direita  ) Regra Prática
. Expoente Negativo - indica que iremos "diminuir" o número de zeros à direita ou "movimentar" a vírgula para esquerda tantas casas quanto indicar o expoente da base 10. 24 x 10-5 = 0,00024 ("Movimentamos" a vírgula 5 casas para esquerda) 0,000066 x 10-3 = 0,000000066 ("Movimentamos" a vírgula 3 casas para esquerda) 23400000 x 10-4 = 2340 ( "Diminuímos" 4 zeros que estavam à direita)
FIM

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NotaçãO CientíFica

  • 2. O que é Notação Científica? Notação Científica é uma forma breve de representar números em especial grandes ou muitos pequenos,com o auxílio de potências de 10. São números usados em anotações científicas.
  • 3. Por exemplo, a maior distância observável do universo mede cerca de 740 000 000 000 000 000 000 000 000 metros, e a massa de um próton é aproximadamente 0,00000000000000000000000000167 gramas.
  • 4. O segredo é multiplicar um número por uma potência de 10. Vejamos alguns exemplos: · 200 = 2 x 100 = 2 x102 · 5.300.000 = 5,3 x 1.000.000 = 5,3 x 106 · 0,00000024 = 2,4 x 0,0000001 = 2,4 x 10-7 Potências de 10 positivas - para números grandes negativas - para números pequenos
  • 5. Expoente Positivo - indica que iremos "aumentar" o número de zeros à direita ou "movimentar" para direita a vírgula tantas casas quanto indicar o expoente da base 10. 33 x 105 = 3300000 ( acrescentamos 5 zeros à direita) 0,00011 x 104 = 1,1 ( "Movimentamos" a vírgula 4 casas para direita) 0,000032 x 103 = 0,032 ("Movimentamos" a vírgula 3 casas para direita ) Regra Prática
  • 6. . Expoente Negativo - indica que iremos "diminuir" o número de zeros à direita ou "movimentar" a vírgula para esquerda tantas casas quanto indicar o expoente da base 10. 24 x 10-5 = 0,00024 ("Movimentamos" a vírgula 5 casas para esquerda) 0,000066 x 10-3 = 0,000000066 ("Movimentamos" a vírgula 3 casas para esquerda) 23400000 x 10-4 = 2340 ( "Diminuímos" 4 zeros que estavam à direita)
  • 7. FIM