1. (8 points) The calculation result of the expression $1+3+4+6+7+9+10+12$ is

保留源文本的换行和格式，直接输出翻译结果如下：

1. (8 points) The calculation result of the expression $1+3+4+6+7+9+10+12$ is
【Solution】Solution: $1+3+4+6+7+9+10+12$
$$
\begin{array}{l}
=(1+9)+(3+7)+(4+6)+10+12 \\
=10+10+10+10+12 \\
=52
\end{array}
$$

Therefore, the answer is: 52.