7.8 Plus 21 Addition :

Number 1	Number 2	Answer
7.8	21	28.8

How to calculate 7.8 plus 21 ?

Let's break down the addition of 07.8 and 2100 step by step:

   07.8      <-- Start with the rightmost column
+  2100
---------

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

   07.8
+  2100
---------
     8


    Add the digits in the rightmost column:
        7 + 1 + 0 = 8
        Write down 8 in the rightmost column, carry over 0 to the next column.

   07.8
+  2100
---------
     8.8


    Add the digits in the rightmost column:
        0 + 2 + 0 = 2
        Write down 2 in the rightmost column, carry over 0 to the next column.

   07.8
+  2100
---------
     28.8

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

The final result is 28.8.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
7.9	22	29.9	7.9 plus 22
8	23	31	8 plus 23
8.1	32	40.1	8.1 plus 32
1.8	8.2	10	1.8 plus 8.2
4.6	3	7.6	4.6 plus 3
8.7	4.2	12.9	8.7 plus 4.2