The decimal 0.5<span> represents the </span>fraction<span> 5/10. The decimal 0.25 represents the </span>fraction<span> 25/100. Decimal </span>fractions<span> always have a denominator based on a power of 10. We know that 5/10 is equivalent to 1/2 since 1/2 times 5/5 is 5/10.</span>
'Commutative' means you can work it in the other direction without changing it. But 1/2 is not the same number as 2/1 . So I guess division is NOT commutative.
