21 Plus 668 Addition :

Number 1	Number 2	Answer
21	668	689

How to calculate 21 plus 668 ?

Let's Add Two Numbers Together!

Imagine you have two numbers:

Number 1: 21

Number 2: 668

Now, let's go step by step:

Step 1: Start by looking at the rightmost digit of each number (the ones place).

Add 21's ones place (1) to 668's ones place (8).

Result: 1 + 8 = 9

Finally, the Result:

Sum: 689

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
21.1	672	693.1	21.1 plus 672
21.2	673	694.2	21.2 plus 673
21.3	681	702.3	21.3 plus 681
4.8	7.5	12.3	4.8 plus 7.5
2.3	9.8	12.1	2.3 plus 9.8
9.9	1.4	11.3	9.9 plus 1.4