--- title: "Year 4 Maths - Finding missing lengths to calculate the perimeter" url: "https://www.stbarnabasdarwen.co.uk/news/2023-02-09-year-4-maths-finding-missing-lengths-to-calculate-the-perimeter" school: "St Barnabas Primary School, A Church of England Academy" --- We are holding a number of open days for children due to start primary school in September 2027. Please see our admissions page for further details. Everyone welcome! # Year 4 Maths - Finding missing lengths to calculate the perimeter ![](https://files.schudio.com/st-barnabas-primary-school/images/news/E8B56D96-FE35-49B0-8491-A6C6E426748C.jpeg) 9 February 2023 In our maths lesson today we have been working hard to calculate missing lengths in order to find the total perimeter. We found that sometimes you need to add the lengths and sometimes you need to subtract them to find the answer. ![](https://st-barnabas-primary-school.schudio.com/images/news/E8B56D96-FE35-49B0-8491-A6C6E426748C.jpeg) [Year 4](https://www.stbarnabasdarwen.co.uk/news/tag/year-4) [Maths](https://www.stbarnabasdarwen.co.uk/news/tag/maths) [![](https://files.schudio.com/st-barnabas-primary-school/imagecache/100x100c/news/D210ABEC-9414-460C-8BCB-F42FC2DCB6D8.jpeg)](https://www.stbarnabasdarwen.co.uk/news/2023-02-09-year-2-collective-worship) Previous ### [Year 2 - Collective Worship](https://www.stbarnabasdarwen.co.uk/news/2023-02-09-year-2-collective-worship) [![](https://files.schudio.com/st-barnabas-primary-school/imagecache/100x100c/news/163700EB-CADC-49F9-AF9D-053065050C4E.jpeg)](https://www.stbarnabasdarwen.co.uk/news/2023-02-09-year-6-computing) Next ### [Year 6 Computing](https://www.stbarnabasdarwen.co.uk/news/2023-02-09-year-6-computing) ### Personal Development - [News](https://www.stbarnabasdarwen.co.uk/news) - [Events](https://www.stbarnabasdarwen.co.uk/events) - [Photo Gallery](https://www.stbarnabasdarwen.co.uk/photo-gallery-category/our-gallery) - [Calendar](https://www.stbarnabasdarwen.co.uk/calendar) - [School Council](https://www.stbarnabasdarwen.co.uk/academy-life/school-council) - [Attendance](https://www.stbarnabasdarwen.co.uk/academy-life/attendance) - [Fundraising](https://www.stbarnabasdarwen.co.uk/academy-life/fundraising) - [Extra Curricular Clubs](https://www.stbarnabasdarwen.co.uk/academy-life/clubs) - [Little Leaders](https://www.stbarnabasdarwen.co.uk/academy-life/little-leaders) - [Visits and Visitors](https://www.stbarnabasdarwen.co.uk/visits-and-visitors) - [British Values](https://www.stbarnabasdarwen.co.uk/british-values) - [Protected Characteristics](https://www.stbarnabasdarwen.co.uk/protected-characteristics) ##### Location Knowlesly Road Darwen Lancashire BB3 2JA ##### Contact Us 01254 702996 ##### Stay Connected - [Facebook](https://www.facebook.com/stbarnabasce/) - [X](https://twitter.com/stbarnabasce) © Copyright 2021–2026 St Barnabas Primary School, A Church of England Academy School & Trust Websites by [ ![Schudio logo](https://www.stbarnabasdarwen.co.uk/img/logo/light.png) ](https://www.schudio.com/)