A book for students to create and use as a reference tool/strategy for computation in addition, subtraction, multiplication or division. (Non-commercial use.) Three booklets (forms) in one, allowing for differentiation. Book 1- 1/5 of the squares blocked out. Book 2- All of the numbers are filled in. Book 3 - All of the squares are blank.An opportunity for students to learn or to demonstrate their counting and numeration knowledge. The TPT Digital overlay has been added to this product.