6In this book, children progress to two-digit addition while learning the commutative property of addition- an important foundation for future math success. Problems incorporate both horizontal and vertical form addition, which prepares children for practice with three and four-digit addition. Upon completion, your child will be ready for advanced arithmetic!

Topics Covered in this Book:

Horizontal addition review

Vertical form addition

Two-digit plus two-digit addition to 198

Early three- & four-digit addition

Addition of three two-digit numbers

Commutative property of addition

Patterns & sequencing