Add two 2-digit Numbers (With Exchange)
A development from the tutorial above, here the numbers do add up to 10 or more, so an exchange from ones to tens is needed. The base 10 blocks are a great way to illustrate what is happening.
A development from the tutorial above, here the numbers do add up to 10 or more, so an exchange from ones to tens is needed. The base 10 blocks are a great way to illustrate what is happening.
