9.9 Plus 11 Addition :

Number 1	Number 2	Answer
9.9	11	20.9

How to calculate 9.9 plus 11 ?

Let's break down the addition of 09.9 and 1100 step by step:

   09.9      <-- Start with the rightmost column
+  1100
---------

    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.

   09.9
+  1100
---------
     9


    Add the digits in the rightmost column:
        9 + 1 + 1 = 10
        Write down 0 in the rightmost column, carry over 1 to the next column.

   09.9
+  1100
---------
     0.9


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

   09.9
+  1100
---------
     20.9

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

The final result is 20.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
10	15	25	10 plus 15
10.1	23	33.1	10.1 plus 23
10.2	27	37.2	10.2 plus 27
0.4	6.8	7.2	0.4 plus 6.8
6.7	1.7	8.4	6.7 plus 1.7
8.2	4.8	13	8.2 plus 4.8