--- title: How long until? Counting on across the hour — a lesson of Mova's school · trees and pragmatics description: «How long until? Counting on across the hour», a lesson of the world course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: "Muuum, how long till we get there?" It is 2:35 and they arrive at 3:10. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [World](https://md.mova.elamur.ai/free/en/corpora/school/world/) / How long until? Counting on across the… # How long until? Counting on across the hour Lesson 107 of the world course of Mova's primary school: 25 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/world/107-how-long-until-counting-on-across-the-hour/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/0/) — "Muuum, how long till we get there?" It is 2:35 and they arrive at 3:10. - [1](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/1/) — Don't count minute by minute; jump like a frog on stepping stones. - [2](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/2/) — First jump to the o'clock: 2:35 to 3:00 is 25 minutes. - [3](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/3/) — Then jump the rest: 3:00 to 3:10 is 10 minutes. 25 + 10 = 35 minutes. - [4](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/4/) — Friendly times like :00 and :30 make good stepping stones. - [5](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/5/) — From 7:28 to 7:45: 2 minutes to 7:30, then 15 more, 17 minutes in all. - [6](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/6/) — Adding works the same way. - [7](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/7/) — Grace's cake needs 35 minutes from 4:40: 20 minutes takes you to 5:00, and the other 15 take you to 5:15. - [8](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/8/) — Split the minutes so you land on the o'clock first. - [9](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/9/) — With hours and minutes, add the hours first, then the minutes. - [10](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/10/) — Some sums run backwards from a deadline: to be at the airport 2 hours before a 10:15 flight, be there at 8:15; with a 45-minute drive, leave at 7:30. - [11](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/11/) — And don't forget the extras: a cinema's 20 minutes of adverts come before the film. - [12](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/12/) — To count on across the hour, jump to the next o'clock first, then add the extra minutes. - [13](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/13/) — From 2:35 to 3:10 is 35 minutes: 25 minutes to 3:00 and 10 more. - [14](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/14/) — From 7:28 to 7:45 is 17 minutes: 2 minutes to 7:30 and 15 more. - [15](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/15/) — To add minutes across the hour, split them: 4:40 + 35 minutes is 4:40 + 20 = 5:00, then + 15 = 5:15. - [16](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/16/) — To add hours and minutes, add the hours first: 5:50 + 1 hour 20 minutes is 6:50, then 7:10. - [17](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/17/) — To find when to leave, work back from the deadline: a 10:15 flight, 2 hours early at the airport, means 8:15; a 45-minute drive means leaving at 7:30. - [18](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/18/) — 11:50 + 1 hour 25 minutes = 1:15, which is after a 1:00 lunch. - [19](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/19/) — From 8:52 to 9:17 is 25 minutes, close to half an hour but 5 minutes short. - [20](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/20/) — Grown-ups often round to "half an hour", which is fine for chat but not for planning. - [21](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/21/) — Cinemas show adverts and trailers before the film, so a 6:40 ticket with 20 minutes of adverts and a 2-hour-5-minute film ends at 9:05. - [22](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/22/) — A washing machine screen showing 1:40 means 1 hour 40 minutes, so a wash started at 9:35 ends at 11:15. - [23](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/23/) — "Quarter to three" plus "an hour and a half" is 2:45 + 1 hour 30 minutes = 4:15. - [24](https://md.mova.elamur.ai/free/en/corpora/school/world/107-how-long-until-counting-on-across-the-hour/24/) — Words people use: "cos" means because, "wicked" means very (New England, USA), "yeah nah" means no (Australia, New Zealand), "sweet as" means great (New Zealand) "servo" means a petrol station (Australia), "sick" means great and "no cap" means "no lie". - ← previous: [Late and early: being where you need to be on time](https://md.mova.elamur.ai/free/en/corpora/school/world/106-late-and-early-being-on-time/) - next →: [How long since? Counting back](https://md.mova.elamur.ai/free/en/corpora/school/world/108-how-long-since-counting-back/) - ↑ back to [World](https://md.mova.elamur.ai/free/en/corpora/school/world/)