9.9 Plus 18 Addition :

Number 1	Number 2	Answer
9.9	18	27.9

How to calculate 9.9 plus 18 ?

Let's break down the addition of 09.9 and 1800 step by step:

   09.9      <-- Start with the rightmost column
+  1800
---------

    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
+  1800
---------
     9


    Add the digits in the rightmost column:
        9 + 8 + 1 = 17
        Write down 7 in the rightmost column, carry over 1 to the next column.

   09.9
+  1800
---------
     7.9


    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
+  1800
---------
     27.9

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

The final result is 27.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
10	23	33	10 plus 23
10.1	26	36.1	10.1 plus 26
10.2	28	38.2	10.2 plus 28
2.1	4.6	6.7	2.1 plus 4.6
5.1	7.6	12.7	5.1 plus 7.6
0.8	1.5	2.3	0.8 plus 1.5