- This PDF File - Mad Minute Math Drills are fast-paced, timed subtraction exercises designed to help students in grades 1-5 improve their math fluency. These drills challenge students to solve as many subtraction problems as possible within ten minute, enhancing their speed, accuracy, and confidence. Perfect for STAAR test preparation, these drills help students develop strong mental math skills, improve problem-solving abilities, and perform better under time constraints. Regular practice re