The present investigation entitled “Yupana and quipu to develop estimation and calculation strategies in Mathematics in an Educational Institution, Trujillo – 2019”. this research is aimed to determine the influence of the use of “Yupana and quipu” in the development of strategies and calculation in mathematics in the students of the first grade of Primary Education of the Experimental Educational Center “Rafael Narváez Cadenillas”, Trujillo – 2019. In addition, the purpose was to improve in the students the development of the ability to use estimation and calculation strategies in mathematics through the use of “Yupana and quipu”. It was carried out with the population of 73 first grade students. The study sample consisted of 21 children from the control group and 25 children from the experimental group, who were given a devolvement test before and after applying th...