8.7 Plus 4 Addition :

Number 1	Number 2	Answer
8.7	4	12.7

How to calculate 8.7 plus 4 ?

Let's break down the addition of 8.7 and 400 step by step:

   8.7      <-- Start with the rightmost column
+  400
---------

    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.

   8.7
+  400
---------
     7


    Add the digits in the rightmost column:
        8 + 4 + 1 = 12
        Write down 2 in the rightmost column, carry over 1 to the next column.

   8.7
+  400
---------
     2.7

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

The final result is 12.7.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
8.8	9	17.8	8.8 plus 9
8.9	14	22.9	8.9 plus 14
9	16	25	9 plus 16
2.1	6.4	8.5	2.1 plus 6.4
0.9	0.3	1.2	0.9 plus 0.3
9.9	7.6	17.5	9.9 plus 7.6