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Arithmetic Questions & Answers

Q:
2. Which of the following fraction is equal to \( 2 \frac{3}{4} \) ?
Q:
a) \( \left(3.9 \times 10^{9}\right)+\left(6.4 \times 10^{7}\right) \) b) \( \left(8.4 \times 10^{-11}\right)-\left(5.1 \times 10^{-12}\right) \) Give your answers in standard form.
Q:
2) Resuelve las siguientes operaciones combinadas, pasando los decimales a fracciones Expresa el resultado con la fracción más simple, como decimal y como porcentaje. a) \( \frac{1}{6} \cdot\left(2-\frac{3}{2}\right)-0, \hat{2}= \) b) \( \frac{21}{5}-\frac{3}{10} \cdot(2,2-0,3)-0,12= \)
Q:
Which of the following fraction is equal to \( 2 \frac{3}{4} \) ?
Q:
Racionales: 1) Expresa los siguientes porcentajes en decimal y en fracción: \( \begin{array}{llll}\text { a) } 30 \% & \text { b) } 8 \% & \text { c) } 77 \% & \text { d) } 150 \%\end{array} \)
Q:
18) Tissues cost \( \$ 2 \) / box. How many boxes did Scott buy if he spent \( \$ 14 \) ?
Q:
Hasil dari \( \left(1,25 \times 10^{3}\right) \times\left(8 \times 10^{-2}\right) \) adalah ... \( \begin{array}{llll}\text { a. } 1 & \text { b. } 10 & \text { c. } 100 & \text { d. } 1.000\end{array} \)
Q:
calculer expmer \( A=\frac{-8}{9}+\frac{8}{9} \times \frac{3}{4}-\frac{1}{3} \)
Q:
2) \( \left.\begin{array}{rl}A & =\frac{3}{7}+\frac{5}{11}-\frac{8}{13} \\ B & =\frac{4}{7}+\frac{6}{11}-\frac{5}{13}\end{array}\right\} \Rightarrow A= \) ?
Q:
metros? b) Se você viajar a uma velocidade de \( 60 \mathrm{~km} / \mathrm{h} \), quanto tempo você levará para percorrer 240 km ?

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