Question

add.
3.506
+4.415
enter the answer in the box.

Explanation:

Step1: Align decimal places

$$3.506 + 4.415$$

Step2: Add from rightmost digit

Start with thousandths place: $6+5=11$, carry over 1.
Hundredths place: $0+1+1=2$.
Tenths place: $5+4=9$.
Ones place: $3+4=7$.
Combine results: $7.921$

Answer:

7.921