Addition and subtraction - Add three-digit and one-digit numbers crossing 10 - Worksheet

The worksheet focuses on adding three-digit and one-digit numbers, particularly when this process involves crossing over the ten boundary, which is referred to as exchanging. It is aligned with the National Curriculum objective that aims to enhance students' ability to perform such additions with exchanges. To support the learning process, a variety of resources are provided, including differentiated worksheets and teaching slides. The key vocabulary for the lesson includes terms such as add, subtract, exchange, strategy, zero as a place holder, columns, place value, number line, and partition. These terms are crucial for understanding the concepts being taught.

During the lesson, students practice adding one-digit numbers to three-digit numbers and learn the importance of exchanging when the ones column exceeds nine. The concept of zero as a placeholder is also highlighted, particularly in cases where subtraction leads to a zero in the tens or hundreds column. Key questions encourage students to think about the effects of addition on different columns and the use of number lines for partitioning numbers. The worksheet activities range from simple number line calculations to complex word and pictorial problems, catering to students working towards, within, or at greater depth of understanding. The reasoning and problem-solving section further challenges students to apply their knowledge to determine when exchanges are necessary and to explore different combinations that result in the same digit in the ones column.