9.9 Plus 3 Addition :

Number 1 Number 2 Answer
9.9 3 12.9

How to calculate 9.9 plus 3 ?

Let's break down the addition of 9.9 and 300 step by step:

   9.9      <-- Start with the rightmost column
+  300
---------

    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.

   9.9
+  300
---------
     9


    Add the digits in the rightmost column:
        9 + 3 + 1 = 12
        Write down 2 in the rightmost column, carry over 1 to the next column.

   9.9
+  300
---------
     2.9

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

The final result is 12.9.
So, 9.9 + 300 = 12.9

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