3.9 Plus 18 Addition :

Number 1 Number 2 Answer
3.9 18 21.9

How to calculate 3.9 plus 18 ?

Let's break down the addition of 03.9 and 1800 step by step:

   03.9      <-- 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.

   03.9
+  1800
---------
     9


    Add the digits in the rightmost column:
        3 + 8 + 1 = 11
        Write down 1 in the rightmost column, carry over 1 to the next column.

   03.9
+  1800
---------
     1.9


    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.

   03.9
+  1800
---------
     21.9

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

The final result is 21.9.
So, 03.9 + 1800 = 21.9

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