0.4 Plus 21 Addition :

Number 1	Number 2	Answer
0.4	21	21.4

How to calculate 0.4 plus 21 ?

Let's break down the addition of 00.4 and 2100 step by step:

   00.4      <-- 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.

   00.4
+  2100
---------
     4


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

   00.4
+  2100
---------
     1.4


    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.

   00.4
+  2100
---------
     21.4

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

The final result is 21.4.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
0.5	30	30.5	0.5 plus 30
0.6	31	31.6	0.6 plus 31
0.7	36	36.7	0.7 plus 36
9.1	2.7	11.8	9.1 plus 2.7
7	1	8	7 plus 1
8.7	0.4	9.1	8.7 plus 0.4