Use this Year 1 Find and Make Number Bonds to 20 to make sure your children have a secure understanding of making number bonds to 20. They can build on knowledge of number bonds to 10 to make bonds to 20. The modelling PowerPoint can be used alongside your teaching input and provides you with an introductory question, as well as a selection of fluency, reasoning and problem solving questions for children to answer. Each question comes with an answer slide to provide instant feedback.