Addition and subtraction within 20 - Add ones using number bonds - Starter

In a Year 1 mathematics lesson focused on addition and subtraction within 20, the children are introduced to adding ones using number bonds. The session begins with a 'Fluent in Four' revision exercise to warm up their arithmetic skills. The children are tasked with completing sentences that involve simple calculations, such as doubling numbers and adding them to halves of others. For example, they find that double 9 plus half of 0 equals 18, and six plus eleven totals 17. The exercise is designed to reinforce their understanding of basic addition and the concept of doubling.

Further into the lesson, pupils are encouraged to name various shapes and use counters to assist with their calculations. This visual and tactile approach helps them to better grasp the concepts of addition. A comparison activity prompts the children to determine who has a fewer number of items, encouraging them to apply their counting skills. The lesson also integrates a sequence activity where students fill in the blanks to complete statements about quantities that change over time, such as the number of items before and after more are added. This practical application helps to solidify their understanding of how addition works in everyday contexts. Additionally, the lesson includes identifying and naming common three-dimensional shapes like cones, cubes, cylinders, and pyramids, integrating geometry with their numerical learning.