Addition and Subtraction - Subtract a three digit number from a three digit number (exchange) - Starter

In a Year 4 mathematics lesson, students are engaged in a series of subtraction problems, developing their understanding of exchanging within three-digit numbers. The lesson begins with a 'Fluent in Four' revision activity designed to consolidate their arithmetic skills. The first task challenges students to perform a division, asking them to find the result of 56 divided by 8. Next, they are presented with a problem involving the subtraction of tens and ones, specifically subtracting one group of four from a total of twenty-four ones and two tens. The aim is to calculate the remaining value.

The lesson continues with real-life application problems, where students must find the total cost of two items: a train costing £3 and 65 pence, and a cube costing £5 and 99 pence. They are tasked with adding these amounts together to find the combined cost. Another practical problem involves a tree that originally grew to 7 metres and 34 centimetres but was then trimmed by 3 metres and 21 centimetres. Students must calculate the tree's new height. Finally, the lesson introduces a more complex subtraction problem where the number 3,113 is subtracted from 8,314, requiring students to understand and apply the concept of exchanging across place value columns to find the correct answer.