Question

1. for the first two problems, circle the vertical calculation where digits of the same kind are lined up. then, finish the calculation and find the sum. for the last two problems, find the sum using vertical calculation. a. 3.25 + 1

3.25
+ 1.0
-------
3.25
+ 1.0
-------
3.25
+ 1
-------

Explanation:

Step1: Align the decimal points

We need to add \(3.25\) and \(1\). First, we can write \(1\) as \(1.00\) to align the decimal points properly. So the numbers become \(3.25\) and \(1.00\).

Step2: Add the numbers vertically

Now, we add the numbers digit by digit from right to left.

• The hundredths place: \(5 + 0 = 5\)
• The tenths place: \(2 + 0 = 2\)
• The ones place: \(3 + 1 = 4\)
• The decimal point remains in the same position.

Putting it all together, we have:
\[

$$\begin{align*} &\ \ 3.25\\ +&\ \ 1.00\\ \hline &\ \ 4.25 \end{align*}$$

\]

Answer:

The sum of \(3.25\) and \(1\) is \(4.25\).