Maths. 4th grade. Quick oral account. 3000 examples

One of the conditions for successful teaching mathematics in elementary school is automated oral skills. The child’s inability to an oral account leads to problems with general performance.
How to develop the ability of an oral account in a child? It is more to consider orally.
It is important to instill in the student a culture of an oral account. If you can count in the mind - it is not recommended to be counted on the fingers, you can not use the calculator, it is a shame to be considered easy examples in the column. An automated oral skill will save precious time when solving problems, long examples, inequalities and equations. In addition, an automated oral account will develop memory, logical thinking, flexibility of the mind and quick wit from a child, and also significantly increase the brain performance - activates the development of speech and intelligence, the ability to retain and switch attention. All basic topics of account techniques from grade 1 to 4. The authors also used the “fast account” technique traditional for the Soviet school. For the convenience of working with the book at the end, answers, rules and algorithms for fulfilling all basic types of accounts are given