3.9 Plus 42 Addition :

Number 1	Number 2	Answer
3.9	42	45.9

How to calculate 3.9 plus 42 ?

Let's break down the addition of 03.9 and 4200 step by step:

   03.9      <-- 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.

   03.9
+  4200
---------
     9


    Add the digits in the rightmost column:
        3 + 2 + 0 = 5
        Write down 5 in the rightmost column, carry over 0 to the next column.

   03.9
+  4200
---------
     5.9


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

   03.9
+  4200
---------
     45.9

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

The final result is 45.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
4	50	54	4 plus 50
4.1	59	63.1	4.1 plus 59
4.2	63	67.2	4.2 plus 63
7	5.7	12.7	7 plus 5.7
5.3	3.1	8.4	5.3 plus 3.1
7.4	8.2	15.6	7.4 plus 8.2