Question

to verify that addition is commutative for whole numbers

Answer 1

You can use examples to show that addition is commutative.
Like,
1+3=4
And 3+1=4
Therefore it shows that a+b=c and b+a=c
Hence Proved

Answer 2

Take two whole numbers = 3,6

(1)  3 + 6 = 9
(2) 6 + 3 = 9

In both steps the result is same.

That proves that addition is commutative for whole numbers.


Hope this helps!