3000 examples in mathematics. We count and explain. Addition and subtraction. 1 class. Pisorova O. V.

The manual contains examples on the main topics of the mathematics course for grade 1, which will help to work out to automatism all types of account techniques in the range of 10 and within 20: numbering calculations of the type 10+6, 17-7-10, addition and subtraction without transition through the category of a type 15+4, 18-6; With the transition through the category of a type 7+6, 13–5.

For each type of account, algorithms are given, knowing which, the child will calculate correctly and quickly. It is very important to bring the skill of using the account algorithm to automatism. It is most effective for this to use the commented score.

First, the teacher explains how to consider - clearly pronounces and repeats the account algorithm. Then the children take turns pronouncing the algorithm when solving examples in the columns. The child should reason as it is written in the algorithm. For any difficulty, he needs to help, prompt. If the child learns to speak well, he will learn to quickly count, and this is the key to success in high school, when he has to fulfill complex calculations.

manual can be used in school lessons and for independent classes at home.