3000 examples in mathematics. The score is within 20. Different levels of complexity. 1 class

The manual contains examples in mathematics for one of the basic for the first class of topics - Addition and subtraction in the range of 20. Like any other topic, it requires attentive understanding and durable consolidation.
As practice shows, the student completely learned the topic if he decides an example and records the answer within 4 to 7 seconds. In this case, we can say that the account skill has been brought to automatism.
To develop the account skill to automatism, examples of different levels of complexity distributed through three blocks are proposed. The 1st level of complexity is 7 columns of ordinary examples. 2nd level of complexity-from 3 to 6 columns of the chains of examples. The 3rd level of complexity is 7 columns of examples with answers in which an action sign or component of addition or subtraction is missed that needs to be restored. Or 2 columns of logical examples in which you need to correctly arrange signs. For logical examples at the end of the book, answers are given.
In order to achieve good results, it is necessary to solve one page of examples per day.
The manual can be used as additional material in mathematics lessons and for independent classes at home