Addition and subtraction - Add two three-digit numbers not crossing 10 or 100 - Worksheet

The worksheet is designed to help Year 6 students master the skill of adding two three-digit numbers without crossing tens or hundreds. It aims to improve their fluency and precision in addition through the use of the column method. Students are encouraged to line up the digits correctly and to set out their additions clearly in columns. The worksheet also emphasises the importance of not exchanging between columns unless there are 10 or more in a column, which is a common area where students might make mistakes.

Students will utilise differentiated sheets, teaching slides, and place value counters to enhance their understanding of the addition process. The key vocabulary includes terms such as 'add', 'subtract', 'column method', 'exchange', 'formal method', 'hundreds', and 'tens'. Through a series of exercises, children will practice adding two three-digit numbers using a place value chart and the column method, with varying degrees of help provided. For example, some exercises will have all steps completed, while others may require the children to complete the place value charts and calculate answers that are presented in a complex manner, involving hundreds, tens, and ones. The worksheet also includes reasoning and problem-solving sections where students can apply their knowledge to spot and correct mistakes in provided calculations, further solidifying their understanding of the concepts taught.