78.4 Plus 21 Addition :

Number 1	Number 2	Answer
78.4	21	99.4

How to calculate 78.4 plus 21 ?

Let's break down the addition of 78.4 and 2100 step by step:

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

    Add the digits in the rightmost column:
        4 + 0 + 0 = 4
        Write down 4 in the rightmost column, carry over 0 to the next column.

   78.4
+  2100
---------
     4


    Add the digits in the rightmost column:
        8 + 1 + 0 = 9
        Write down 9 in the rightmost column, carry over 0 to the next column.

   78.4
+  2100
---------
     9.4


    Add the digits in the rightmost column:
        7 + 2 + 0 = 9
        Write down 9 in the rightmost column, carry over 0 to the next column.

   78.4
+  2100
---------
     99.4

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

The final result is 99.4.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
78.5	27	105.5	78.5 plus 27
78.6	28	106.6	78.6 plus 28
78.7	31	109.7	78.7 plus 31
3.5	5.3	8.8	3.5 plus 5.3
9.4	8.6	18	9.4 plus 8.6
1.5	1.8	3.3	1.5 plus 1.8