Réponse:
**A = 15 + 5 * (-8):**
\[A = 15 + 5 \times (-8)\]
\[A = 15 - 40\]
\[A = -25\]
**B = (-8) ÷ (4 - 5):**
\[B = \frac{-8}{4-5}\]
\[B = \frac{-8}{-1}\]
\[B = 8\]
**C = (19 - 12) ÷ (-4):**
\[C = \frac{19 - 12}{-4}\]
\[C = \frac{7}{-4}\]
**D = 10 + 10 × (-4):**
\[D = 10 + 10 \times (-4)\]
\[D = 10 - 40\]
\[D = -30\]
**E = (12 - 19) ÷ 4:**
\[E = \frac{12 - 19}{4}\]
\[E = \frac{-7}{4}\]
