Question

65 ( UFF ) ajudem-me !!!

Answer 1

$\frac{10^{10}+10^{20} + 10^{30}}{10^{20}+10^{30} + 10^{40}} = \frac{10^{10} (1 + 10^{10} + 10^{20})}{10^{20} (1 + 10^{10} + 10^{20})} = \frac{10^{10}}{10^{20}} = 10^{10-20} = 10^{-10}$

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