by Cindy Elkins, OK Math and Reading Lady

Number Bonds are pairs of numbers that combine to total the target or focusÂ number. When students learn number bonds they are applying the commutative, identity, and zero properties. PLUS, the information can be applied to both addition **and** subtraction problems. Number bonds of 10 are very critical to our place value system, and will enhance a studentâ€™s success with future addition and subtraction strategies such as use of an open number line.

- KG students should master number bonds to 5.
- First graders should master number bonds to 10.
- Second graders should master number bonds to 20.