3000 examples in mathematics. Equality. Addition and subtraction within 100. Two levels of complexity. Answers. 2-3 grades

The manual will help to form and consolidate the skill of an automated account on basic topics of elementary school: “The account within 10”, “The account within 20”, “The account within 100.”
The manuals are given the equations with missed numbers. It is necessary to insert numbers so that the equality is true. Examples of two levels of complexity are proposed. Before the child begins to solve these chains on his own, you can explain to him how best to do it. For example, take an equal chain
1+2 = ___ = 10 -___ = ___+0. The chain consists of several equalities, each of which is an example with the same answer. Solving these examples sequentially, we enter the necessary numbers. The first example of the chain is 1+2 = 3. We enter the number 3 and get the second example 3 = 10-7. Finally, the third example is 10-7 = 3+0.
At the end of the book, answers are given for self -testing.
Solution of the chains of examples is an effective training that allows you to bring to automatism the computing skills of the child. Automated account skill will help save precious time when solving problems, long examples, inequalities and equations. In addition, an automated account will develop memory, logical thinking, flexibility of the mind and quick wit in the child, and also significantly increase the brain performance - activates the development of speech and intelligence, the ability to retain and switch attention.
The manual will be useful for working in the classroom and independent classes at home