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	33	41.9	8.9 plus 33
9	38	47	9 plus 38
6.4	2.6	9	6.4 plus 2.6
3.1	2.1	5.2	3.1 plus 2.1
8.7	4.2	12.9	8.7 plus 4.2