8.4 Plus 4 Addition :

Number 1	Number 2	Answer
8.4	4	12.4

How to calculate 8.4 plus 4 ?

Let's break down the addition of 8.4 and 400 step by step:

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

    Add the digits in the rightmost column:
        4 + 0 + 0 = 4
        Write down 4 in the rightmost column, carry over 0 to the next column.

   8.4
+  400
---------
     4


    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.

   8.4
+  400
---------
     2.4

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

The final result is 12.4.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
8.5	12	20.5	8.5 plus 12
8.6	18	26.6	8.6 plus 18
8.7	21	29.7	8.7 plus 21
4.6	0.5	5.1	4.6 plus 0.5
5	5.1	10.1	5 plus 5.1
2.5	0.4	2.9	2.5 plus 0.4