Fausto Presutti 
Playing with Math 5 
Additive and Numerical Calculus within 20

PLAYING WITH MATH it’s an educational path of math created by Fausto Presutti. Its efficacy has been proved by hundreds teachers in primary and secondary school. The educational path is composed by 19 books with different didactic path of mathematic, full of game-exercise that allow children to develop psycho-cognitive abilities and mathematic knowledge.
Playing with Math 5 – ADDITIVE AND NUMERICAL CALCULUS WITHIN 20 is based on 42 game-exercise cards. The formative path of this book is structured with these conceptual areas: Pp. 3-14 Equalities and expression with various operations within 19 having two or more addends or subtrahend Pp. 15-24 Line numbers and numerical chains within 19. Composition and decomposition within 19 with various addends Pp. 25-28 Tables of addition or subtraction between 0 and 19 Pp. 29-38 Operations of addition and subtraction within 19 based on line of number, numerical chains, composition and decomposition Pp. 39-44 Tables of addition or subtraction in various entrances combined to the calculation of operations in line The Series’ theoretical model and formative path are visible on this website: http://didactics.ispef.eu/psychodidactic.htm