Similar term is an important concept in the first volume of seventh grade mathematics, which refers to monomials with the same type and index. Such as in polynomial 2x? y？ And 5x? y？ Medium, x? y？ Is their equivalent.
The concept of similar terms can be used to simplify the calculation and combination of polynomials. In polynomials, we can combine similar terms to make the form of polynomials simpler and clearer. This method of merging similar items is very important in subsequent learning, such as factorization, simplification, evaluation and so on.
Similar projects can also be used to solve other math problems. For example, when solving the equation, we need to shift and merge the similar terms to make the equation easier to solve.
In mathematics competition, similarity is also one of the knowledge points frequently tested, which requires students to master and use it skillfully. By learning and applying the concepts and methods of similar items, students can be helped to solve math problems better, improve their math scores and become better.
Matters needing attention in learning similar projects:
1. Understand the definition and judgment method of similar items: similar items are single items of the same type and index. When judging whether two monomials are similar, it depends on whether their types and indicators are exactly the same. Only when these two conditions are met at the same time can they be regarded as similar items. When learning similar projects, we need to deeply understand their definitions and judgment methods.
2. Master the method of merging similar items: merging similar items is to add up the coefficients of similar items, and the indexes of letters and letters remain unchanged. When merging similar items, don't leave out coefficients, and don't merge different types of items. Correctly merging similar terms can simplify the calculation and form of polynomials and improve the efficiency of solving mathematical problems. Students need to master the method of merging similar items.
3. Using similar terms to solve practical problems: similar terms can not only be used for the calculation and combination of polynomials, but also solve some practical problems. For example, when solving tracking problems and engineering problems, the concept of similar items can be used to simplify the calculation. Using similar items to solve practical problems can deepen the understanding of the concepts and methods of similar items and improve the ability to solve mathematical problems.