Question

add.
\

$$\begin{array}{r}64 \\\\ + 13 \\\\ \\hline \\square\\end{array}$$

Explanation:

Step1: Add the ones place

We add the digits in the ones place: \(4 + 3 = 7\).

Step2: Add the tens place

We add the digits in the tens place: \(6 + 1 = 7\).

Step3: Combine the results

Combining the results from the ones and tens places, we get \(77\).

Answer:

\(77\)