--- title: The bar model: the whole from the part that is left, and from a difference — a lesson of Mova's school · trees and pragmatics description: «The bar model: the whole from the part that is left, and from a difference», a lesson of the lessons course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Draw the whole as a bar cut into equal units. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/lessons/159-model-method-units/) [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/) / [Lessons](https://md.mova.elamur.ai/free/en/corpora/school/lessons/) / The bar model: the whole from the part… # The bar model: the whole from the part that is left, and from a difference Lesson 159 of the lessons course of Mova's primary school: 3 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). - [0](https://md.mova.elamur.ai/free/en/corpora/school/lessons/159-model-method-units/0/) — Draw the whole as a bar cut into equal units. - [1](https://md.mova.elamur.ai/free/en/corpora/school/lessons/159-model-method-units/1/) — If 2/5 is spent, 2 units are gone and 3 units are left. - [3](https://md.mova.elamur.ai/free/en/corpora/school/lessons/159-model-method-units/3/) — Comparing works the same way: if Ann has 2/5 as many as Ben, Ann has 2 units, Ben has 5, and the difference is 3 units. - ← previous: [Ages: in how many years will one be twice or three times as old](https://md.mova.elamur.ai/free/en/corpora/school/lessons/158-ages-how-many-times/) - next →: [Olympiad: how many digits number the pages of a book](https://md.mova.elamur.ai/free/en/corpora/school/lessons/160-digits-on-the-pages/) - ↑ back to [Lessons](https://md.mova.elamur.ai/free/en/corpora/school/lessons/)