Question

add.
2 2 8
7
+ 3 , 8 1 1
overline{ square , square square square }

Explanation:

Step1: Align the numbers by place value

We have the numbers \(228\), \(7\), and \(3811\). Let's write them with aligned place values:
\[

$$\begin{align*} &\quad\ \ 228\\ &\quad\ \ \ \ \ 7\\ &+ 3811\\ \hline \end{align*}$$

\]
Which is equivalent to:
\[

$$\begin{align*} &\quad\ \ 0228\\ &\quad\ \ \ 0007\\ &+ 3811\\ \hline \end{align*}$$

\]

Step2: Add the ones place

Ones place: \(8 + 7+ 1 = 16\). Write down \(6\), carry over \(1\).

Step3: Add the tens place

Tens place: \(2 + 0 + 1+ 1\) (carried over) \(= 4\). Write down \(4\).

Step4: Add the hundreds place

Hundreds place: \(2 + 0+ 8 = 10\). Write down \(0\), carry over \(1\).

Step5: Add the thousands place

Thousands place: \(0 + 3+ 1\) (carried over) \(= 4\). Write down \(4\).

Putting it all together:
\[

$$\begin{align*} &\quad\ \ 0228\\ &\quad\ \ \ 0007\\ &+ 3811\\ \hline &4046 \end{align*}$$

\]

Wait, let's check again:

Wait, actually, let's do the addition directly:

\(228+7 = 235\)

Then \(235 + 3811=4046\)

Answer:

\(4,046\)