PLAYING WITH NUMBERS is a teaching tool of exercises-game that allows you to: 1) develop the math skills of children of 5-6 years; 2) provide opportunities for teachers to implement educational continuity between Infancy School and Primary School, comparing and verifying the capabilities of the first end and the initial capabilities of entry into the second mathematical relation to the purchase of the number and the conceptualization of the World numeric; 3) evaluate the math skills of children and young people in difficulty cognitive and/or learning mathematics. The objectives PLAYING WITH NUMBERS 1 are: Pp. 4-7 Arithmetical quantifiers Pp. 8-15 Arithmetical Comparators - Correspondence greater, less than, equal Pp. 16-17 Numerical succession from 1 to 5 Pp. 18-22 Reading and writing numbers from 1 to 5 Pp. 23-26 Acquisition of cardinal number from 1 to 5 Pp. 27-30 Correspondence between cardinal number, sequence of numbers and ordinal numbers Pp. 31-34 Calculation of mathematical sets in different number bases Pp. 35-36 Acquisition of the ordinal number from l to 5 Pp. 37-40 Verification of the calculation in numerical sequence from 1 to 5 by spatial movement and temporal succession.