Addition and subtraction - Add and subtract multiples of 100 - Worksheet

This worksheet is designed to help children master the concept of adding and subtracting multiples of 100, in line with the National Curriculum objective. It provides differentiated worksheets and teaching slides to cater to various levels of understanding. The vocabulary for this lesson includes terms such as 'add', 'subtract', 'equal', 'multiples', and 'hundreds'. The children are encouraged to use their existing knowledge of addition and subtraction of ones and tens to tackle larger numbers, specifically multiples of 100. The use of concrete manipulatives and pictorial representations is emphasized to help students visualize the value of digits and understand the mathematical processes involved.

Key questions posed in the worksheet aim to prompt students to compare and contrast the addition of different multiples of hundreds, to articulate these sums in words, and to explore various ways to represent the calculations. For instance, the worksheet asks questions like "What is the same and what is different about 2 hundreds and 3 hundreds?" and challenges students to find multiple representations for a sum like 200 + 300. The tasks are structured to guide students from building and drawing number sentences to writing them in words, using part-whole models, and solving picture calculations. The worksheet also extends to reasoning and problem-solving activities, where students are asked to find all possible missing numbers and explain their reasoning, further deepening their understanding of adding and subtracting multiples of 100.