Number bonds are a visual representation of the relationship between two numbers that add up to a given sum. Using number bonds can help students understand addition concepts by breaking a given number into two smaller numbers that can be added together. For example, to add 9 + 4, students can use a number bond to show that 9 can be split into 4 and 5, so 4 + 5 = 9. By using number bonds, students can visualize the parts that make up a whole and develop fluency in addition concepts. This can improve mental math skills and build a strong foundation for more complex math concepts.

Students are given a number bond with only one number. They must think and give the other two numbers that could make the number bond correct. They must then give all of the related facts for those 3 numbers.