Yes, with worked out solutions for many of them as well. The HIGs and TGs have answers for both the Textbooks and Workbooks. They also include lesson suggestions. If all you want is answers to the Workbooks you could get the Answer Keys. There is one for Grades 1–3 and one for Grades 5–6. It does have answers to Textbook as well, but since it is only answers, it’s cheaper and may be all you need.  

However, we don’t recommend using just the Workbooks, as it means missing out on most of the core material, explanations, exercises, and teaching notes.