Mathematical Exercises. Adding and Subtracting within 20, 375 examples. 6-7 years

Mathematical exercises.This original teaching aid:- fully meets the requirements for forming addition and subtraction skills within 20;- contributes not only to the successful preparation of a child for school but also to their effective learning in 1st grade under any... mathematics programs;- is maximally close to the standards of a student workbook;- helps to develop the child's mental arithmetic skills, thinking and visual perception, fine motor skills, and hand coordination;- teaches the child to adhere to a uniform calligraphic writing mode of digits when solving problems;- differs from similar publications in that it develops stable automatic counting skills in the child.