Jennifer's family loves to drink iced tea mixed with lemonade in the summer. Yesterday, Jennifer mixed 4 ounces of lemonade and 8 ounces of iced tea in a tall glass for herself. Then, she made a pitcher to share with 8 ounces of lemonade and 24 ounces of iced tea. Did the glass and the pitcher have the same ratio of lemonade to iced tea?

Add. Write your answer as a mixed number in simplest form. \[ 5 \frac{2}{5}+6 \frac{2}{5} \]

Subtract. Write your answer as a mixed number in simplest form. \[ 4 \frac{3}{5}-2 \frac{2}{5} \]

Use \( <,> \), or \( = \) to compare the \( \begin{array}{cc}\begin{array}{ll}\text { (a) } 0.37 & \square 0.39 \\ \text { (b) } 6.4 & \square 6.40 \\ \text { (c) } 0.04 & \square 0.1\end{array} & \square<\square \\ \square>\square & \square=\square \\ \times & 5\end{array} \)

Uma auxiliar de enfermagem pretende usar a menor quantidade possivel de gavetas para acomodar 80 frascos de um tipo de medicamento, 150 frascos de outro tipo, e 120 frascos de um terceiro tipo. Se ela colocar a mesma quantidade de frascos em todas as gavetas, e medicamentos de um único tipo em cada uma delas, quantos frascos, no máximo, ela pode colocar em cada gaveta?

\( \begin{array}{ll}\text { Sejam } & a=12^{4} \\ \text { e } & b=30^{8} \\ \text { Calcule o } & c=42^{9} \\ & m d c(a, b, c)\end{array} \)