Elementary arithmetic refers to operations that include addition, subtraction, multiplication and division in an expression. In elementary arithmetic, in order to ensure the accuracy of calculation, certain order and rules must be followed. Here are some handwritten newspapers about elementary arithmetic.

The definition of elementary arithmetic

Elementary arithmetic refers to operations that include addition, subtraction, multiplication and division in an expression. For example: 3+5×2-4÷ 2.

operation sequence

Without brackets, the order of elementary arithmetic is multiplication and division before addition and subtraction. If there are parentheses, the expression in parentheses is evaluated first.

Operational priority

Multiplication and division take precedence over addition and subtraction. In the operation at the same level, multiplication and division have the same priority and proceed from left to right in turn; Addition and subtraction also have the same priority, and they are also carried out from left to right.

Simplify operation

In elementary arithmetic, we can try to simplify the operation by merging similar items and extracting common factors, thus reducing the amount of calculation.

Check the calculation results

After elementary arithmetic, you need to check whether the calculation result is correct. You can verify it by substituting the result into the original expression, or check it with a calculator.

practical application

Elementary arithmetic has many practical applications in daily life, such as calculating the total price of shopping and calculating the time of travel. Mastering the method of elementary arithmetic can help us solve practical problems better.

practise

The exercises of elementary arithmetic can be listed in the handwritten newspaper for students to practice and consolidate.

By making this handwritten newspaper, students can better understand and master the methods and laws of elementary arithmetic and improve their mathematical calculation ability. At the same time, handwritten newspapers can also increase interest and participation in learning.

Elementary arithmetic needs to pay attention to the operation order, priority and the use of parentheses. At the same time, we should examine the questions and pay attention to the calculation methods of fractions and decimals. Simplifying operation can improve efficiency, and checking calculation results can avoid errors. In the process of solving problems, attention should be paid to the alignment of decimal points and digits to ensure the accuracy of calculation.