12.9 Plus 42 Addition :

Number 1	Number 2	Answer
12.9	42	54.9

How to calculate 12.9 plus 42 ?

Let's break down the addition of 12.9 and 4200 step by step:

   12.9      <-- Start with the rightmost column
+  4200
---------

    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.

   12.9
+  4200
---------
     9


    Add the digits in the rightmost column:
        2 + 2 + 0 = 4
        Write down 4 in the rightmost column, carry over 0 to the next column.

   12.9
+  4200
---------
     4.9


    Add the digits in the rightmost column:
        1 + 4 + 0 = 5
        Write down 5 in the rightmost column, carry over 0 to the next column.

   12.9
+  4200
---------
     54.9

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

The final result is 54.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
13	44	57	13 plus 44
13.1	47	60.1	13.1 plus 47
13.2	54	67.2	13.2 plus 54
8.7	8.8	17.5	8.7 plus 8.8
6.5	1	7.5	6.5 plus 1
0.9	5.7	6.6	0.9 plus 5.7