Answer:
Let's look at the whole numbers first and put aside the decimals;
38 and 7, let's add these two: 38 + 7 = <u>45</u>
Now let's look at the decimals;
0.42 and 0.10, let's add these two:
<h3> 0 . 4 2</h3><h3> 0 . 1 0</h3>
+ _______
<h3> 0. 52 → Next, we add the decimals and the whole numbers:</h3>
45 + 0.52
<h2>= <u>45.52</u>, 45.52 is your answer.</h2>