2.1 Plus 21 Addition :

Number 1	Number 2	Answer
2.1	21	23.1

How to calculate 2.1 plus 21 ?

Let's break down the addition of 02.1 and 2100 step by step:

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

    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.

   02.1
+  2100
---------
     1


    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.

   02.1
+  2100
---------
     3.1


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

   02.1
+  2100
---------
     23.1

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

The final result is 23.1.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
2.2	25	27.2	2.2 plus 25
2.3	29	31.3	2.3 plus 29
2.4	35	37.4	2.4 plus 35
4	6.5	10.5	4 plus 6.5
4.1	3.5	7.6	4.1 plus 3.5
8.3	1.1	9.4	8.3 plus 1.1