9.9 Plus 1 Addition :

Number 1	Number 2	Answer
9.9	1	10.9

How to calculate 9.9 plus 1 ?

Let's break down the addition of 9.9 and 100 step by step:

   9.9      <-- Start with the rightmost column
+  100
---------

    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.

   9.9
+  100
---------
     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.

   9.9
+  100
---------
     0.9

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

The final result is 10.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
10	4	14	10 plus 4
10.1	5	15.1	10.1 plus 5
10.2	7	17.2	10.2 plus 7
5.9	4.8	10.7	5.9 plus 4.8
6.4	5.3	11.7	6.4 plus 5.3
9.9	6.1	16	9.9 plus 6.1