9.9 Plus 129 Addition :

Number 1	Number 2	Answer
9.9	129	138.9

How to calculate 9.9 plus 129 ?

Let's break down the addition of 009.9 and 12900 step by step:

   009.9      <-- Start with the rightmost column
+  12900
---------

    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.

   009.9
+  12900
---------
     9


    Add the digits in the rightmost column:
        9 + 9 + 1 = 18
        Write down 8 in the rightmost column, carry over 1 to the next column.

   009.9
+  12900
---------
     8.9


    Add the digits in the rightmost column:
        0 + 2 + 0 = 3
        Write down 3 in the rightmost column, carry over 0 to the next column.

   009.9
+  12900
---------
     38.9


    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.

   009.9
+  12900
---------
     138.9

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

The final result is 138.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
10	135	145	10 plus 135
10.1	143	153.1	10.1 plus 143
10.2	151	161.2	10.2 plus 151
2.5	9.4	11.9	2.5 plus 9.4
5.2	0.7	5.9	5.2 plus 0.7
4.8	2.9	7.7	4.8 plus 2.9