9.9 Plus 80 Addition :

Number 1	Number 2	Answer
9.9	80	89.9

How to calculate 9.9 plus 80 ?

Let's break down the addition of 09.9 and 8000 step by step:

   09.9      <-- Start with the rightmost column
+  8000
---------

    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.

   09.9
+  8000
---------
     9


    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.

   09.9
+  8000
---------
     9.9


    Add the digits in the rightmost column:
        0 + 8 + 0 = 8
        Write down 8 in the rightmost column, carry over 0 to the next column.

   09.9
+  8000
---------
     89.9

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

The final result is 89.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
10	88	98	10 plus 88
10.1	90	100.1	10.1 plus 90
10.2	91	101.2	10.2 plus 91
6	2.2	8.2	6 plus 2.2
6.3	4.7	11	6.3 plus 4.7
0.8	8.8	9.6	0.8 plus 8.8