12.3 Plus 21 Addition :

Number 1	Number 2	Answer
12.3	21	33.3

How to calculate 12.3 plus 21 ?

Let's break down the addition of 12.3 and 2100 step by step:

   12.3      <-- Start with the rightmost column
+  2100
---------

    Add the digits in the rightmost column:
        3 + 0 + 0 = 3
        Write down 3 in the rightmost column, carry over 0 to the next column.

   12.3
+  2100
---------
     3


    Add the digits in the rightmost column:
        2 + 1 + 0 = 3
        Write down 3 in the rightmost column, carry over 0 to the next column.

   12.3
+  2100
---------
     3.3


    Add the digits in the rightmost column:
        1 + 2 + 0 = 3
        Write down 3 in the rightmost column, carry over 0 to the next column.

   12.3
+  2100
---------
     33.3

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

The final result is 33.3.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
12.4	30	42.4	12.4 plus 30
12.5	32	44.5	12.5 plus 32
12.6	39	51.6	12.6 plus 39
4	3.3	7.3	4 plus 3.3
1.4	2.4	3.8	1.4 plus 2.4
5.5	2.1	7.6	5.5 plus 2.1