8.1 Plus 4 Addition :

Number 1	Number 2	Answer
8.1	4	12.1

How to calculate 8.1 plus 4 ?

Let's break down the addition of 8.1 and 400 step by step:

   8.1      <-- Start with the rightmost column
+  400
---------

    Add the digits in the rightmost column:
        1 + 0 + 0 = 1
        Write down 1 in the rightmost column, carry over 0 to the next column.

   8.1
+  400
---------
     1


    Add the digits in the rightmost column:
        8 + 4 + 1 = 12
        Write down 2 in the rightmost column, carry over 1 to the next column.

   8.1
+  400
---------
     2.1

    Continue to the left:
        There are no more columns to the left.

The final result is 12.1.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
8.2	6	14.2	8.2 plus 6
8.3	11	19.3	8.3 plus 11
8.4	15	23.4	8.4 plus 15
9	1.7	10.7	9 plus 1.7
7.3	7.2	14.5	7.3 plus 7.2
1.3	3.6	4.9	1.3 plus 3.6