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	133	143	10 plus 133
10.1	141	151.1	10.1 plus 141
10.2	146	156.2	10.2 plus 146
2.9	6.1	9	2.9 plus 6.1
9.6	5.1	14.7	9.6 plus 5.1
7.2	3.1	10.3	7.2 plus 3.1