Master addition, subtraction, multiplication & division with exercises that have a fun reward for drilling them! Adding & subtracting with regrouping, adding three numbers, multiplying & dividing with zeros, multiplying 2-digit numbers, dividing with remainders, word problems and other activities are included. 48 reproducible pages, softcover. Answer key is included with reduced student pages with the correct answers overlaid. Grade 4. Slightly Imperfect.