Q: We already have the Arithmetic 1-2 concept cards. I was skimming over what concept cards are included in the 3rd grade edition and as far as I could tell they are the same except for the division steps are missing. Is this a correct assumption or do these cards go into deeper detail? I only ask because if they are basically the same or close to the same I would rather not buy them unless I absolutely need to, seeing as they would only be used for one year. Thank you in advance for your help with this matter.