Knowing your number bonds (pairs of numbers that add up to a total) is crucial because it develops number sense, speeds up mental arithmetic, and builds a strong foundation for more advanced maths skills like addition, subtraction, and problem-solving. 

A solid understanding of number bonds enables children to quickly recognise number patterns, spot relationships between numbers, and apply mathematical concepts to real-world situations, improving their confidence and success in maths.

Children in Year 1 are able to earn their Number Bond badges if they know their number bonds first to 10 and then to 20. The best way to learn them is by practising and there are rhymes to help such as the one below:

Number Bonds to 10 0 and 10 are big strong men 1 and 9 are feeling fine 2 and 8 are never late 3 and 7 come from Devon 4 and 6 like to play tricks 5 and 5 come alive 6 and 4 hold open the door 7 and 3 visit for tea 8 and 2 are feeling blue 9 and 1 have some fun 10 and zero are super heroes