Write the fraction \( \frac{48}{30} \) in simplest form.

b) \( -5: \frac{10}{3}+\frac{10}{4} \)

Convince Me! Use Structure Dario says, "I can find \( 9 \times 0<3 \times 1 \) without computing. I can think about properties that I know." What could he mean?

c) \( 3,23-3,23= \)

1) \( \left[\begin{array}{l}3 \\ 4\end{array}\right]-\left[\begin{array}{l}-5 \\ -1\end{array}\right] \)

EXERCICE 2 - AFRIQUE DU NORD 2001 On considère le nombre : \[ F=\frac{3 \times 10^{2} \times 1,2 \times 10^{-5}}{15 \times 10^{2}} \] Donner l'écriture scientifique du nombre \( F \).