Source: https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/3-1-2-decomposing-tasks [Revision notes](https://senecalearning.com/en-gb/revision-notes.md) › [Primary](https://senecalearning.com/en-gb/revision-notes/primary.md) › [Computer Science](https://senecalearning.com/en-gb/revision-notes/primary/computer-science.md) › [Computing: Year 5 & 6 National Curriculum](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum.md) › Decomposing Tasks # Decomposing Tasks Computing: Year 5 & 6 National Curriculum, topic 3.1.2 ## Computational Thinking with Cupcakes Decomposing is a method used in computational thinking. It means breaking a big task into smaller tasks. ### Decomposing: example ![Decomposing: example](https://image-v2.cdn.app.senecalearning.com/2025-07/7956ef64-8bca-4ade-bcc9-3a3bd3d08f23/f894c05e-14a8-4f78-91b5-475fbb90e23c.png) - Imagine telling your friends how to make cupcakes for a party. - If you just say, ‘make the cupcakes’, they might get confused. - Everyone might do it differently ### Decomposing gives the steps ![Decomposing gives the steps](https://image-v2.cdn.app.senecalearning.com/2025-07/5b58859a-3c76-4bb1-b651-7a7d77d592cc/8803086c-3a56-4126-8197-559ebf0596d8.png) - There are different parts to making cupcakes: - Make the batter. - Make the icing. - Bake the cakes. - Add the toppings. - Each of these tasks can be decomposed into logical steps. ### Steps ![Steps](https://image-v2.cdn.app.senecalearning.com/2025-07/4e4d79a8-16c5-41f8-b8a8-7006b2995fb2/e73de4b4-1087-4316-939f-5084f0ac3631.png) - The steps must be clear. - The steps must be in the right order. - The steps must be clear and repeatable so you get the same results every time. - The steps and rules that are followed are called an algorithm. ### Algorithms ![Algorithms](https://image-v2.cdn.app.senecalearning.com/2025-07/4b56792e-1b1f-4a80-963f-f7e541ffd72a/5e74e317-3f95-48de-959c-19eec62fba3e.png) - Think of an algorithm like the steps in the recipe for the cupcakes. ## Test yourself on Decomposing Tasks - After you have decomposed a task (such as baking a cake), what are you left with? - In an algorithm, what order must the steps be done in to get the same results every time? - What is the name of the method used to break down a complex task down into smaller chunks? - How should the steps in an algorithm be [Practise this topic for free](https://app.senecalearning.com/classroom/course/19eff8d0-37ca-47d8-89d9-9810d0f53c27/section/ecd6f9ae-118a-4d7d-a872-3dea60fabe96/session) - Previous topic: [3.1.1 Computational Thinking](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/3-1-1-computational-thinking.md) - Next topic: [3.1.3 Algorithms (1/2)](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/3-1-3-algorithms-12.md) ## Computing: Year 5 & 6 National Curriculum contents ### 1 Using Computers - 1.1 Computers as a Tool - [1.1.1 Uses of Computers](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/1-1-1-uses-of-computers.md) - [1.1.2 More Uses of Computers](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/1-1-2-more-uses-of-computers.md) - [1.1.3 Advantages of Information Technology](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/1-1-3-advantages-of-information-technology.md) - [1.1.4 More Advantages of Information Technology](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/1-1-4-more-advantages-of-information-technology.md) - 1.2 Data - [1.2.1 Storing Data](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/1-2-1-storing-data.md) - [1.2.2 Databases](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/1-2-2-databases.md) - [1.2.3 Sorting & Filtering Data](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/1-2-3-sorting-and-filtering-data.md) - [1.2.4 Interrogating Data](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/1-2-4-interrogating-data.md) - 1.3 Plagiarism & Illegal Sharing - [1.3.1 Plagiarism](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/1-3-1-plagiarism.md) - [1.3.2 Copyrighted Content](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/1-3-2-copyrighted-content.md) ### 2 Networks & the World Wide Web - 2.1 Networks - [2.1.1 Parts of Networks](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-1-1-parts-of-networks.md) - [2.1.2 The Internet](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-1-2-the-internet.md) - [2.1.3 The World Wide Web](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-1-3-the-world-wide-web.md) - 2.2 Searching Online - [2.2.1 Searching the World Wide Web](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-2-1-searching-the-world-wide-web.md) - [2.2.2 Searching Tips](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-2-2-searching-tips.md) - [2.2.3 Reliable Information](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-2-3-reliable-information.md) - 2.3 Protecting Yourself Online - [2.3.1 Your Digital Footprint](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-3-1-your-digital-footprint.md) - [2.3.2 Being Safe](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-3-2-being-safe.md) - [2.3.3 Online Safety](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-3-3-online-safety.md) - [2.3.4 Viruses](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-3-4-viruses.md) - [2.3.5 Malware](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-3-5-malware.md) - [2.3.6 People Online](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-3-6-people-online.md) - [2.3.7 Your Feelings](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-3-7-your-feelings.md) - [2.3.8 Getting Help](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/2-3-8-getting-help.md) ### 3 Computational Thinking - 3.1 Computational Thinking - [3.1.1 Computational Thinking](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/3-1-1-computational-thinking.md) - [3.1.2 Decomposing Tasks](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/3-1-2-decomposing-tasks.md) - [3.1.3 Algorithms (1/2)](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/3-1-3-algorithms-12.md) - [3.1.4 Algorithms (2/2)](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/3-1-4-algorithms-22.md) - [3.1.5 Logical Reasoning & Debugging](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/3-1-5-logical-reasoning-and-debugging.md) ### 4 Computer Languages - 4.1 Coding - [4.1.1 Code](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/4-1-1-code.md) - [4.1.2 Programs](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/4-1-2-programs.md) - [4.1.3 Writing Programs](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/4-1-3-writing-programs.md) - [4.1.4 Writing Your Own Program: Input, Outputs, Design](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/4-1-4-writing-your-own-program-input-outputs-design.md) - [4.1.5 Turning an Algorithm into an App (1/2)](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/4-1-5-turning-an-algorithm-into-an-app-12.md) - [4.1.6 Turning an Algorithm into an App (2/2)](https://senecalearning.com/en-gb/revision-notes/primary/computer-science/computing-year-5-and-6-national-curriculum/4-1-6-turning-an-algorithm-into-an-app-22.md)