Thirty-six missing-number equations mix addition, subtraction, multiplication and division on a single practice page, with a blank standing in for one term in each problem, such as 4 × ___ = 20 or 70 ÷ ___ = 10. Students are told to solve directly when they can and, when stuck, to work backward using the inverse operation, turning 6 + ___ = 7 into 7 − 6, for example. A running total line at the bottom lets students self-score out of 36 once finished. A second page lays out every solved answer in the same four-column grid, so the full set can be checked without a separate teacher key.