3.1 Plus 9 Addition :

Number 1	Number 2	Answer
3.1	9	12.1

How to calculate 3.1 plus 9 ?

Let's break down the addition of 3.1 and 900 step by step:

   3.1      <-- Start with the rightmost column
+  900
---------

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

   3.1
+  900
---------
     1


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

   3.1
+  900
---------
     2.1

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

The final result is 12.1.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
3.2	14	17.2	3.2 plus 14
3.3	15	18.3	3.3 plus 15
3.4	20	23.4	3.4 plus 20
6	4	10	6 plus 4
9.6	8.7	18.3	9.6 plus 8.7
7	6.6	13.6	7 plus 6.6