Use Notice and Wonder with a 10-frame, connecting cubes, and place-value cards to ask and answer math questions. Then, represent teen numbers using addition and subtraction equations and one 10.

Column subtraction is a way of subtracting larger numbers. It is called column subtraction, because you write one number underneath the other, using place value to sort the tens and ones in ...

They could use objects, pictures or arrays to share out amounts equally. Some children might use a number line to do repeated subtraction to divide.