Addition and subtraction - Subtract one- from two-digit numbers - Worksheet

In a mathematics lesson focusing on addition and subtraction, Year 6 students are tasked with mastering the mental arithmetic involving three-digit numbers and hundreds. The National Curriculum objective is to add and subtract numbers mentally, which includes understanding and working with a three-digit number and hundreds. To facilitate this learning, resources such as differentiated worksheets and teaching slides are utilized. Key vocabulary terms such as 'add', 'subtract', 'multiple', 'mental methods', and 'partition' among others are introduced to support the students' understanding of the concepts.

The lesson's activities encourage students to apply their knowledge of place value when adding and subtracting multiples of 100. For instance, they explore how the ones and tens columns remain unaffected when adding or subtracting 100s to or from a three-digit number. Students work on fluency and precision through various exercises, such as completing number sentences and arranging numbers in ascending or descending order. The lesson also includes reasoning and problem-solving tasks, where students must determine which multiples of 100 can be added to a given number to fall within a specific range. This task not only reinforces their computational skills but also deepens their understanding of number relationships and place value.