This math topic focuses on calculating the elapsed time between two given times, particularly emphasizing situations where the times are given in half-hour increments. The problems involve determining how many minutes earlier one clock shows compared to another. The challenges help enhance skills in understanding and computing negative elapsed time. Each question presents two specific times, asking to find the difference in minutes. Multiple choice answers are provided for students to select the correct time difference.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.