Save time from having to work out the problems on your own and focus on seeing what your child needs with this convenient answer key. The steps to the answers are laid out so that you know how to teach your child the correct methods and step to get to the right answers. Evaluate your child's math success using this teacher key to your student's Arithmetic 2 workbook. With all of the answers written in, you can be sure to answer all of your 2nd grader's math questions. 356 pages. Spiral Bound. Grade 2.