Zheng's Hypothyroidism = Parenthesis + Combined Like Terms

Abstract

There are thousands of math problems, like a sea of smoke. When studying mathematics, some students always feel dazzled and overwhelmed. In fact, as long as we can understand the essence of mathematical concepts and mathematical operations, and master the rules of mathematical operations, we can figure out the complicated mathematical problems and bring them into a simple and orderly operation track. Such as integer addition and subtraction, its essence is to combine similar items. The rule of integer addition and subtraction is the organic combination of the rule of removing brackets and the rule of combining like terms. To perform the Turtle-style addition operation is actually to do two things repeatedly: one is to remove the parentheses, and the other is to combine similar items. As long as you know and understand the definition of like terms, master the rules of removing parentheses and combining like terms, the addition and subtraction of integer expressions will be easily solved. Tens of thousands of integer addition and subtraction problems are included in such a simple operation track. Example 2 Simplification: When solving the original formula to solve this kind of problem, usually go to the parentheses first, then the square brackets, and finally the curly brackets. every time you go to parentheses