Question

Calcule os resultados obtidos com cadauna das operações matemáticas usando as seguintes notações científicas

Answer 1

$a)\\ 1,2\times10^4+8,3\times10^4=\\ (1,2+8,3).10^4=\\8,3\times10^4=83.000 \\ \\ b)\\ 4,5\times10^{-3}-1,7\times10^{-3}\\ (4,5-1,7).10^{-3}=\\ 2,8\times10^{-3}=0,0028\\ \\ c)\\(3,6\times10^5)\times(2,3\times10^{-2})=\\ (3,6\times2,3)(10^{5-2}=\\ 8,28\times10^3=8280 \\\\d) \\ (5,8\times10^{-1}\div(2,9\times10^4)=\\(5,8\div2,9)(10^{-1-4}=\\2\times10^{-5}=0,00002\\\\e)\\ (8\times10^{-2})^3=\\ 8^3\times10^{-6}\\512\times10^{-6}=0,000512$

$f)\\ \sqrt[3]{729\times10^6} =\\ \sqrt[3]{3^6\times10^6} =\\ 3^2\times10^2=\\ 9\times100=900$