Effectuer ces opérations: 378,36 + 307,271 + 29,172 + 5,193 = ? et 7445,98 - 445,28 = ?

$$
\begin{array}{r}
307,271 \\
- \quad 44,528 \\
\hline
\end{array}
$$

$$
\begin{array}{r}
307,271 \\
- \quad 44,528 \\
\hline
\mathbf{262,743} \\
\end{array}
$$
The result is $\boxed{262,743}$.

$$
29,12 \times 6 = 174,72
$$

$$
29,12 \times 30 = 873,60
$$

$$
\begin{array}{r}
29,12 \\
\times \quad 36 \\
\hline
174,72 \\
873,60 \\
\hline
\mathbf{1048,32} \\
\end{array}
$$
The result is $\boxed{1048,32}$.

$$
\begin{array}{r}
378,360 \\
+ \quad 5,193 \\
\hline
\end{array}
$$

$$
\begin{array}{r}
378,360 \\
+ \quad 5,193 \\
\hline
\mathbf{383,553} \\
\end{array}
$$
The result is $\boxed{383,553}$.