0.9 Plus 21 Addition :

Number 1	Number 2	Answer
0.9	21	21.9

How to calculate 0.9 plus 21 ?

Let's break down the addition of 00.9 and 2100 step by step:

   00.9      <-- 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.

   00.9
+  2100
---------
     9


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

   00.9
+  2100
---------
     1.9


    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.

   00.9
+  2100
---------
     21.9

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

The final result is 21.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
1	22	23	1 plus 22
1.1	30	31.1	1.1 plus 30
1.2	38	39.2	1.2 plus 38
5.4	4	9.4	5.4 plus 4
7.2	5.7	12.9	7.2 plus 5.7
6.7	8.9	15.6	6.7 plus 8.9