https://www.khanacademy.org/math/mr-class-5/xd7fc145664b9cb11:measuring-time/xd7fc145664b9cb11:12-hr-and-24-hr-clock/v/12-hr-and-24-hr-clock 2026-02-25T07:40:45.884125818Z 12 Hr and 24 Hr clock Did you know there are two ways to tell time? One uses AM and PM, and the other just keeps counting up to 24! In this video, we’ll learn the "Secret Plus 12" trick to turn afternoon time into military time. You’ll never be confused by a bus schedule or an airport clock ever again! Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw 12 Hr and 24 Hr clock Did you know there are two ways to tell time? One uses AM and PM, and the other just keeps counting up to 24! In this video, we’ll learn the "Secret Plus 12" trick to turn afternoon time into military time. You’ll never be confused by a bus schedule or an airport clock ever again! https://cdn.kastatic.org/ka-youtube-converted/iK1CUKzKB3c.mp4/iK1CUKzKB3c.mp4 284 12 Hr and 24 Hr clock https://www.khanacademy.org/math/class-6-bridge-course-mh/x5cd1d0cf7d2bf401:measurement/x5cd1d0cf7d2bf401:time-measurement/e/word-problems-on-time-measurement 2026-02-25T07:40:45.884125818Z Word Problems on time measurement In this exercise, students will learn how to add and subtract time by carrying and borrowing minutes, calculate duration within the same period, and determine elapsed time across AM and PM using the 24-hour clock conversion method. Khan Academy exercise https://www.khanacademy.org/math/strengthened-shs-general-math/x24dc5a0902f75de5:patterns-arithmetic-and-geometric-sequence-and-series/x24dc5a0902f75de5:time-conversion/a/12-and-24-hour-time 2025-01-31T11:23:03.723679407Z 12- and 24-hour time Describe a 12- and 24-hour clock system; Convert 12-hour time and 24-hour time, and vice versa; Solve problems involving 12- and 24-hour time; Compare the time in different world time zones to the time in the Philippines using a world time zone map; and Solve problems on comparing the time in different world time zones to the time in the Philippines. article https://www.khanacademy.org/math/strengthened-shs-general-math/x24dc5a0902f75de5:patterns-arithmetic-and-geometric-sequence-and-series/x24dc5a0902f75de5:time-conversion/e/12-and-24-hour-time 2025-01-31T12:34:53.910112813Z 12- and 24-hour time Describe a 12- and 24-hour clock system; Convert 12-hour time and 24-hour time, and vice versa; Solve problems involving 12- and 24-hour time; Compare the time in different world time zones to the time in the Philippines using a world time zone map; and Solve problems on comparing the time in different world time zones to the time in the Philippines. Clarice Fajardo Villanueva exercise https://www.khanacademy.org/math/cc-third-grade-math/time/elapsed-time/e/telling-time-word-problems 2026-05-06T05:31:17.506778064Z Telling time word problems (within the hour) Solve a word problem to find the duration of an event.  Both analog or digital clocks are included. Lindsay Spears exercise