These C.A.S. (Colorado Academic Standards) Math Reviews 21-30 with answer keys cover a myriad of topics that combine fifth grade Math Expressions concepts with the Colorado Academic Standards. The documents are not read-only files so that you can adapt these questions to fit your classes’ needs. These quizzes cover word problems, decimals, multiplication, exponents, patterns, fractions, order of operations, volume, place value, word-standard-expanded numbers, quadrilateral attributes, long division with decimals vs. long division with remainders, area, and more. I hope these review quizzes will help in your math program. Before you purchase, please download and look at the first 10 C.A.S. quizzes for free to see if this is something that will be valuable for your students. Additionally, the first two in this set are available as a free preview. Thank you!