---
title: Sum and difference: two amounts from their total and their gap — a lesson of Mova's school · trees and pragmatics
description: «Sum and difference: two amounts from their total and their gap», a lesson of the lessons course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: If two amounts add up to a total and one is bigger by a difference, add the difference to the total: now bo
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/lessons/149-sum-and-difference/)

<!-- crumbs -->
[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/) / Sum and difference: two amounts from t…

# Sum and difference: two amounts from their total and their gap

<!-- .vabout -->
Lesson 149 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).

<!-- list vl: b t -->
- [0](https://md.mova.elamur.ai/free/en/corpora/school/lessons/149-sum-and-difference/0/) — If two amounts add up to a total and one is bigger by a difference, add the difference to the total: now both amounts are as big as the bigger one, so halve.
- [1](https://md.mova.elamur.ai/free/en/corpora/school/lessons/149-sum-and-difference/1/) — Two classes have 58 pupils together, and one has 6 more: (58 + 6) ÷ 2 = 32 in the bigger class, 32 - 6 = 26 in the smaller.
- [2](https://md.mova.elamur.ai/free/en/corpora/school/lessons/149-sum-and-difference/2/) — Careful with giving: if Tom gives Ben 3 marbles and then they have the same, Tom had 3 + 3 = 6 more than Ben, not 3.

<!-- pn -->
- ← previous: [The area of a shape made of rectangles](https://md.mova.elamur.ai/free/en/corpora/school/lessons/148-composite-shapes/)
- next →: [A square cut into equal strips](https://md.mova.elamur.ai/free/en/corpora/school/lessons/150-square-cut-into-strips/)
- ↑ back to [Lessons](https://md.mova.elamur.ai/free/en/corpora/school/lessons/)