21 Plus 400.9 Addition :

Number 1	Number 2	Answer
21	400.9	421.9

How to calculate 21 plus 400.9 ?

Let's break down the addition of 02100 and 400.9 step by step:

   02100      <-- Start with the rightmost column
+  400.9
---------

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

   02100
+  400.9
---------
     9


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

   02100
+  400.9
---------
     09


    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.

   02100
+  400.9
---------
     109


    Add the digits in the rightmost column:
        2 + 0 + 0 = 2
        Write down 2 in the rightmost column, carry over 0 to the next column.

   02100
+  400.9
---------
     2109


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

   02100
+  400.9
---------
     42109

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

The final result is 42109.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
21.1	406.9	428	21.1 plus 406.9
21.2	408.9	430.1	21.2 plus 408.9
21.3	409.9	431.2	21.3 plus 409.9
2.8	7.6	10.4	2.8 plus 7.6
5.8	4.2	10	5.8 plus 4.2
9.4	8.5	17.9	9.4 plus 8.5