clkirby1/khan-exercises — comment on commit 953520eb8a95cc46ad505b8d9dc89cf5b995ee44
File: exercises/number_properties_terminology_1.html line 78
By clkirby1:

I also changed the question to "a+b=b+a represents which one of the following properties:" since arguably some of these properties are NOT properties of addition (specifically the distributive property).