Addition and subtraction - Add and subtract 1s - Presentation

The presentation for Lesson 2, titled 'Add and Subtract 1s', takes a deep dive into the fundamental concepts of addition and subtraction for two-digit numbers. The lesson begins with a discussion that prompts students to think about the effects of adding or subtracting one from a number. Visual aids are used to help students create sentences that describe scenarios involving addition or subtraction in a real-world context, such as children playing in a park or chicks in a yard. This approach helps to contextualize the mathematical operations, making them more relatable and easier to grasp.

Further activities encourage students to explore numerical patterns and understand the relationship between different addition and subtraction operations. By using number tracks and visual representations, students are tasked with continuing patterns that involve adding or subtracting one or two from a given number. Reasoning exercises challenge students to verify the truth of certain statements about addition and subtraction, reinforcing the concept that addition is commutative while subtraction is not. The lesson also includes problem-solving scenarios that require students to apply their understanding of distance and difference, such as calculating the distance between two houses or the difference in distance walked over multiple days. Independent work and discussions round off the lesson, prompting students to explain their reasoning and explore how tools like bead strings can assist in adding small numbers.