Addition and subtraction - Add and subtract 1s - Presentation

The presentation for Lesson 7 on 'Add and Subtract 1s' introduces young learners to basic arithmetic involving two-digit numbers. The objective is to help students become comfortable with adding and subtracting single units and to identify patterns within these operations. The lesson begins with a discussion inviting students to think of alternative terms for addition and subtraction. Following this, the class is encouraged to create sentences using visual prompts, such as images of children in a park or chicks, to contextualise the mathematical concepts. For example, they might say, "There are four children playing in the park. One more child joins them, so there will be five children playing altogether."

Subsequent activities in the lesson guide students through the process of adding and subtracting one to various numbers and observing the resulting patterns. They are asked to continue number sequences, highlighting the relationship between adding one and adding two. The exercises are designed to strengthen their understanding of number tracks and the commutative property of addition. Students also engage in reasoning tasks that apply these skills to real-life scenarios, such as calculating the distance between two points or the difference in distance walked by two individuals. Independent work further reinforces the concepts, where students create addition and subtraction sentences based on picture cards, demonstrating their ability to add or subtract two or three from given numbers.