Addition and subtraction - Check calculation - Worksheet

The worksheet titled "Check Calculations" from masterthecurriculum.co.uk is part of the Fluency & Precision 2 series, focusing on Lesson 2 which teaches children the vital skill of verifying their addition and subtraction work through the use of inverse operations. The National Curriculum objective for this lesson is to recognise and utilise the inverse relationship between addition and subtraction to check calculations. To facilitate learning, the lesson provides differentiated worksheets and teaching slides, and encourages the use of vocabulary such as 'addition', 'subtraction', 'inverse operations', and 'check calculations'. The lesson emphasises the importance of discussing and sharing strategies for checking calculations, not only through the inverse method but also via concrete resources, number lines, and estimation.

Students are prompted by key questions to think critically about the checking process: What resources can you use to check your calculation? Why is it important to check calculations? Can you think of other ways to represent this? The activities on the worksheets guide children to practice finding inverse calculations using bar models and to identify and correct any errors they encounter. As they progress, they are challenged to create their own bar models and tackle more complex calculations. The lesson aims to develop reasoning and problem-solving skills, with a section dedicated to these aspects where children continue working on checking calculations by solving reasoning questions. The overall goal is to build fluency and precision in mathematical operations, ensuring a deep understanding of the concepts taught.