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Significance of division formula and reading and writing of division formula;
The meaning of division: divide some items into several parts evenly and find out how much each part is, which can be calculated by division. (So when there are keywords with average or average scores in the topic, students can quickly determine to use the division formula for calculation. )
Name of each part of the division formula: dividend γ divisor = quotient. Quotient of simultaneous dividend, divisor and its variation. How to proceed? It is also an operation that can be carried out simultaneously in this step.
How to read the division formula: read it from left to right, ⊙ read it as division, ⊙ read it as arithmetic, and the other numbers remain unchanged. It should be noted that division and division have different meanings Students can deepen their understanding of division through this.
The division formula 12 ÷ 4 = 3 is read as: 12 divided by 4 equals 3. When learning division, the main content is the average score, so in this process, students can draw pictures or circles to make an average distribution, which can help everyone understand the close relationship between multiplication and division in the table.
Four operations in mathematics:
In mathematics, when the first-level operation (addition and subtraction) and the second-level operation (multiplication and division) are in the same formula at the same time, their operation order is multiplication and division first, then addition and subtraction. If there are parentheses, the order of operations at the same level is from left to right. Such operations are called four operations.
The fourth refers to the calculation rules of addition, subtraction, multiplication and division. The expressions of four operations do not necessarily have four operation symbols. Generally, it refers to the operation of combining the majority into a number with two or more operation symbols and brackets.
Addition: the operation of combining two numbers into one number/two decimals into one decimal/two fractions into one fraction.
Subtraction: The operation of finding the other addend by knowing the sum of two addends and one of them.
Multiplication: A simple operation to find the sum of several identical addends. The meaning of decimal multiplication by integer is the same as that of integer multiplication. Multiplying a number by a pure decimal means finding a few tenths and a few percent of this number ... The meaning of multiplying a fraction by an integer is the same as that of integer multiplication.
Division: the operation of finding another factor by knowing the product of two factors and one of them. It means the same as integer division.