8.9 Plus 4 Addition :

Number 1	Number 2	Answer
8.9	4	12.9

How to calculate 8.9 plus 4 ?

Let's break down the addition of 8.9 and 400 step by step:

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

    Add the digits in the rightmost column:
        9 + 0 + 0 = 9
        Write down 9 in the rightmost column, carry over 0 to the next column.

   8.9
+  400
---------
     9


    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.

   8.9
+  400
---------
     2.9

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

The final result is 12.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
9	7	16	9 plus 7
9.1	8	17.1	9.1 plus 8
9.2	12	21.2	9.2 plus 12
8.3	0.4	8.7	8.3 plus 0.4
1.7	1.7	3.4	1.7 plus 1.7
1.9	9	10.9	1.9 plus 9