8.7 Plus 21 Addition :

Number 1	Number 2	Answer
8.7	21	29.7

How to calculate 8.7 plus 21 ?

Let's break down the addition of 08.7 and 2100 step by step:

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

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

   08.7
+  2100
---------
     7


    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.

   08.7
+  2100
---------
     9.7


    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.

   08.7
+  2100
---------
     29.7

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

The final result is 29.7.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
8.8	26	34.8	8.8 plus 26
8.9	35	43.9	8.9 plus 35
9	40	49	9 plus 40
4.7	4.3	9	4.7 plus 4.3
3.7	6.3	10	3.7 plus 6.3
6.6	6.8	13.4	6.6 plus 6.8