1, when solving the problem of addition, subtraction, multiplication and division, we must first understand the order of operations. Generally speaking, add and subtract first, then multiply and divide. Just like adding first and then multiplying in our daily life. For example, in the formula 3+2×4, you should first calculate 2 times 4 to get 8, and then add 3 to get the result 1 1. If you count from left to right, the result will be 14, which is wrong.
2. Mastering the operation rules of addition, subtraction, multiplication and division is the key to solving the formula problem. Addition is to combine similar items and add up the same numbers. Subtraction means subtracting a number is equal to adding the reciprocal of this number. Multiplication is to add the same numbers, or to represent the sum of several same numbers. The law of division can be understood as an average distribution, which divides a number into several parts. For example, 5×3 means adding five 3s, and the result is 15. And 10÷2 means that 10 is divided into two parts on average, and the result is 5.
3. On the basis of mastering the operation law, we need to calculate carefully. Pay attention to the writing position of numbers in calculation to avoid calculation errors caused by irregular writing. At the same time, we should also pay attention to the problems of carry and borrow. For example, when calculating 7+8, you need to add 10 to the decimal place.
The importance of addition, subtraction, multiplication and division in grade two;
Importance of basic knowledge: addition, subtraction, multiplication and division are the basic knowledge of primary school mathematics. For second-year students, these operational skills are the basis for their further study of mathematics and other disciplines. Mastering these basic skills will help them to make correct calculations when solving practical problems, so as to better understand the quantitative relationship and spatial relationship.
2. Importance of thinking training: Addition, subtraction, multiplication and division is not only an operation skill, but also an important tool for training students' logical thinking and mathematical thinking. Through the practice of addition, subtraction, multiplication and division, students can learn how to analyze and solve problems, and gradually form a rigorous and accurate way of thinking. This way of thinking not only contributes to their math study, but also affects the way they deal with problems in their daily life.
3. Importance of application practice: Addition, subtraction, multiplication and division are widely used in real life. Students often encounter problems related to quantity, distance and time in their daily life. Mastering the skills of addition, subtraction, multiplication and division can help them better understand and solve these problems. For example, when shopping, calculate the total price and travel time. You need to use the operational knowledge of addition, subtraction, multiplication and division.