Exercice 19 :
↓ Enoncé :
Calculer :
- \( = 6 + 4 \times 5 \)
- \( = (6 + 4) \times 5 \)
- \( = 20 \div 4 + 6 \times 3 \)
- \( = 8 \times (12 - 5) + 6 \)
↓ Solution :
- \(
\begin{align}
6 + 4 \times 5 &= 6 + 20 \\
&= 26
\end{align}
\)
- \(
\begin{align}
(6 + 4) \times 5 &= 10 \times 5 \\
&= 50
\end{align}
\)
- \(
\begin{align}
20 \div 4 + 6 \times 3 &= 5 + 6 \times 3 \\
&= 5 + 18 \\
&= 23
\end{align}
\)
- \(
\begin{align}
8 \times (12 - 5) + 6 &= 8 \times 7 + 6 \\
&= 56 + 6 \\
&= 62
\end{align}
\)