Adding Four-Digit Numbers with Exchanges Revision - PowerPoint

In this engaging maths resource designed for Year 5 students, the focus is on revising the process of adding four-digit numbers with exchanges, also known as carrying over. The lesson begins with a recap of how to handle exchanges when two four-digit numbers are added together. For example, when adding 3,364 and 1,217 using the column method, students are shown that if the sum in any column exceeds 9, an exchange must be made. This is demonstrated by adding the ones column: 4 + 7 equals 11, which requires exchanging 10 ones for one ten and leaving one in the ones column. This methodical approach ensures that students understand the concept of carrying over in multi-digit addition.

The lesson continues with a series of exercises where students practice adding numbers together and identifying the necessary exchanges. For instance, when adding 6,257 and 2,819, students are prompted to spot the two exchanges required to find the correct sum. Additionally, the resource includes practical word problems, such as calculating the total number of stamps collected by Boris and Doris or the total miles traveled by two cars. These real-world applications help solidify the students' understanding of the addition process. The resource also challenges students with tasks like completing bar models, comparing sums using inequality symbols, and correcting mistakes in given calculations, all of which contribute to a comprehensive understanding of adding four-digit numbers with exchanges.