Question

计算：
$\begin{array}{r} 13.67\\ + 0.312\\ hline end{array}$

Explanation:

Step1: Align decimal points

Write the numbers as:

$$\begin{align*} 13.670\\ +\ 0.312\\ \hline \end{align*}$$

Step2: Add column by column

• Thousandths place: \(0 + 2 = 2\)
• Hundredths place: \(7 + 1 = 8\)
• Tenths place: \(6 + 3 = 9\)
• Ones and tens place: \(13 + 0 = 13\)

Combining these, we get:

$$\begin{align*} 13.670\\ +\ 0.312\\ \hline 13.982 \end{align*}$$

Answer:

\(13.982\)