Calculate the Sum: 6.4 + 2.56 Decimal Addition

To solve this problem, we'll follow these steps:

• Step 1: Align the numbers based on the decimal point.
• Step 2: Perform addition starting from the rightmost digit, carrying over as necessary.
• Step 3: Ensure the decimal point is placed correctly in the final answer.

Now, let's work through each step:

Step 1: Align the numbers vertically:

  6.40
+ 2.56
------

Step 2: Start with the hundredths place (rightmost) and move left.

• Add the hundredths: $0 + 6 = 6$.
• Add the tenths: $4 + 5 = 9$.
• Add the units: $6 + 2 = 8$.

Step 3: Place the decimal point directly below the other decimal points in the final answer.

  6.40
+ 2.56
------
  8.96

Therefore, the solution to the problem is $8.96$.