9.9 Plus 77 Addition :

Number 1	Number 2	Answer
9.9	77	86.9

How to calculate 9.9 plus 77 ?

Let's break down the addition of 09.9 and 7700 step by step:

   09.9      <-- Start with the rightmost column
+  7700
---------

    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
+  7700
---------
     9


    Add the digits in the rightmost column:
        9 + 7 + 1 = 16
        Write down 6 in the rightmost column, carry over 1 to the next column.

   09.9
+  7700
---------
     6.9


    Add the digits in the rightmost column:
        0 + 7 + 0 = 8
        Write down 8 in the rightmost column, carry over 0 to the next column.

   09.9
+  7700
---------
     86.9

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

The final result is 86.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
10	78	88	10 plus 78
10.1	80	90.1	10.1 plus 80
10.2	87	97.2	10.2 plus 87
5.3	9.7	15	5.3 plus 9.7
9.1	0.5	9.6	9.1 plus 0.5
4.6	7.4	12	4.6 plus 7.4