The manual is compiled according to the requirements of the Standard educational programs in mathematics for students of the 1st-2nd grades. It contains a variety of tasks aimed at the development of quick computing skills, mathematical thinking, memory, and is a base for learning mathematical terminology. The main purpose of the manual is to help the teacher select material for organizing work on the formation and consolidation of oral numeracy skills. The main goal of oral calculations is the formation of quick counting skills, as well as the development of km