2.9 Plus 21 Addition :

Number 1	Number 2	Answer
2.9	21	23.9

How to calculate 2.9 plus 21 ?

Let's break down the addition of 02.9 and 2100 step by step:

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

    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.

   02.9
+  2100
---------
     9


    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.

   02.9
+  2100
---------
     3.9


    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.

   02.9
+  2100
---------
     23.9

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

The final result is 23.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
3	22	25	3 plus 22
3.1	25	28.1	3.1 plus 25
3.2	32	35.2	3.2 plus 32
0.3	7.7	8	0.3 plus 7.7
9.2	5.9	15.1	9.2 plus 5.9
8.6	2.3	10.9	8.6 plus 2.3