Addition and subtraction within 20 - Add ones using number bonds 2 - Worksheet

The worksheet titled "Addition and Subtraction within 20 - Add Ones Using Number Bonds" is an educational resource designed to help children understand and practise the concept of number bonds within 20. The National Curriculum objective covered by this worksheet is to add and subtract one-digit and two-digit numbers to 20, including zero. The lesson involves using differentiated sheets and teaching slides to aid learning, with a focus on fluency and precision in calculations.

During the lesson, children are encouraged to explore the relationship between tens and ones, particularly understanding that if their answer contains one ten, then one side of the calculation will also contain a ten. For example, in the calculation (13 + 6), children will recognise that the answer will have one ten in it. The worksheet poses key questions such as "How many numbers will contain a ten if your answer has 1 ten in it?" and "How can we find the missing number to the number bonds?" Through a series of activities, children are tasked with completing additions by finding the missing numbers and writing related calculations, thereby reinforcing their understanding of number bonds. The worksheet also includes reasoning and problem-solving sections where children can apply their knowledge to check answers and identify correct additions that result in specific totals, such as 15 or 17.