Sure, let's go through each operation step-by-step.
### 1. Add largest 7-digit number and smallest 6-digit number
To add the largest 7-digit number, [tex]\( 9999999 \)[/tex], and the smallest 6-digit number, [tex]\( 100000 \)[/tex]:
[tex]\[
\begin{array}{r}
9999999 \\
+ 100000 \\
\hline
10099999 \\
\end{array}
\][/tex]
So, the sum of the largest 7-digit number and the smallest 6-digit number is [tex]\( 10,099,999 \)[/tex].
### 2. Subtract [tex]\( 99999 \)[/tex] from [tex]\( 140857 \)[/tex]
[tex]\[
\begin{array}{r}
140857 \\
- 99999 \\
\hline
40858 \\
\end{array}
\][/tex]
So, [tex]\( 140857 \)[/tex] minus [tex]\( 99999 \)[/tex] is [tex]\( 40,858 \)[/tex].
### 3. Add the numbers: [tex]\( 43240 \)[/tex], [tex]\( 62318 \)[/tex], [tex]\( 105738 \)[/tex], [tex]\( 2469 \)[/tex]
[tex]\[
\begin{array}{r}
43240 \\
+ 62318 \\
+ 105738 \\
+ 2469 \\
\hline
213765 \\
\end{array}
\][/tex]
So, the sum of [tex]\( 43240 \)[/tex], [tex]\( 62318 \)[/tex], [tex]\( 105738 \)[/tex], and [tex]\( 2469 \)[/tex] is [tex]\( 213,765 \)[/tex].
Hence, the results for each operation are:
1. The sum of the largest 7-digit number and the smallest 6-digit number is [tex]\( 10,099,999 \)[/tex].
2. [tex]\( 140857 \)[/tex] minus [tex]\( 99999 \)[/tex] is [tex]\( 40,858 \)[/tex].
3. The sum of [tex]\( 43240 \)[/tex], [tex]\( 62318 \)[/tex], [tex]\( 105738 \)[/tex], and [tex]\( 2469 \)[/tex] is [tex]\( 213,765 \)[/tex].