Addition and subtraction - Subtract a two-digit number from a ​three-digit number crossing 10 or 100​ - Starter

The lesson plan for Year 3's Autumn Term, Week 7, Day 3, focuses on enhancing students' proficiency in addition and subtraction through a series of engaging activities. The session begins with a 'Fluent in Four' revision task, which aims to consolidate students' understanding of basic multiplication and column addition. In one of the exercises, students are asked to complete a multiplication model by identifying that four ones multiplied by a certain number equals 40. They also tackle a straightforward multiplication problem where they calculate the product of 9 and 5. These warm-up tasks are designed to prepare the students for more complex calculations ahead.

As the lesson progresses, the students are introduced to a two-step problem that involves column addition. They practice adding two-digit numbers to three-digit numbers, crossing tens and hundreds. For example, the students add 75 to 455 using column addition, ensuring they carry over as necessary. Additionally, they solve a real-life scenario where Rosie buys a rose and a daisy and pays with a £20 note. Students must calculate the change she should receive, reinforcing their subtraction skills. The lesson also includes spatial reasoning exercises where students write descriptions to demonstrate the route taken on a grid, further developing their problem-solving abilities. Through this blend of mathematical challenges, the students enhance their arithmetic skills in a structured and interactive manner.