What is the first thing to count if there is addition and division?

Multiplication and division first, then addition and subtraction, if there are parentheses, you must first calculate the inside of the parentheses, which is what the teacher taught me when I was in school.

In this case, the parentheses must be counted first.

In parentheses, if there are no parentheses, the division is calculated first.

The four mixed operations of addition and division together should be calculated first for division and then for addition. The four mixed operations, the level of operation, the level of multiplication and division, are higher than the level of addition and subtraction, in layman's terms, that is, multiplication and division first, and then addition and subtraction. If you multiply and divide, or add or subtract, there is a continuous multiplication and division operation, or a continuous addition and subtraction operation, in the order of precedence.

There is addition and division, of course, division should be calculated first, because of the priority in mathematics.

That's it, first calculate multiplication and division, then add and subtract, and if there are parentheses, you need to calculate the inside of the brackets first. So if you don't see the parentheses, it's always the multiplication and division that comes first.

In mixed operations, there are parentheses that are counted in parentheses first, then division, and finally addition.

If there are parentheses, the brackets are counted first, multiplication and division are calculated, and then addition and subtraction are calculated.

The order of operations for the mixed operation of addition, subtraction, multiplication and division is:

Multiply and divide first and then add or subtract (without parentheses).

When there are parentheses, the brackets are counted first (the parentheses are counted in parentheses first, then in the middle brackets, and finally in the curly braces).

The basic algorithm is that when there are parentheses, the parentheses are calculated first. In addition, subtraction, multiplication and division, multiplication and division are calculated first, and then addition and subtraction are calculated. Therefore, in the problem, the division should be calculated first, and then the addition should be calculated.

Does that depend on whether there are parentheses between these operators? The factors that affect the operation data such as curly braces or middle brackets, if there are no these parentheses, then it must be the division and then the addition, their operation rules are to calculate multiplication and division first, and then add and subtract, multiplication and division belong to the same level of operation, addition and subtraction also belong to the same level of operation, the same level is calculated in order, and it will not affect which one is calculated first.

1.Sibling operations without parentheses, i.e., only addition and subtraction or only multiplication and division, the order of operation is calculated from left to right;

2.The different levels of operations without parentheses are the four operations with addition, subtraction, multiplication and division, and the order of operation is multiplication and division first, and then addition and subtraction;

3.If there are parentheses, the ones in the parentheses are calculated first, and the order of operations in the parentheses must also be calculated according to the order of multiplication and division, then addition and subtraction, and the order of calculation from left to right.

Multiply and divide first, then add and subtract, and there are parentheses to count the brackets.

If there are parentheses, the brackets will be counted first, and if there are no parentheses, the multiplication and division will be calculated first, and then the addition and subtraction will be calculated.

The procedure followed is with parentheses, starting from the brackets, and the brackets are also calculated first by multiplying and dividing and then adding and subtracting.

Calculate the division first, and if there are parentheses, count the parentheses first.

Of course, it's the division first, and then the division first, and then the division, and then the division, and then the addition, the division, the priority, and the addition.

There is addition, there is division, the division is calculated first, the one with parentheses is counted first, and the one without parentheses is counted first.

If there are parentheses, the content in the brackets will be counted first, and without parentheses, it will be multiplied and divided first, and then added or subtracted.

There is addition and division at the same time, and the division must be calculated first, and then the addition. Because the operation rule is to calculate multiplication and division first, and then add and subtraction.

A mixture of addition and division.

It should be the division operation that starts with the division.

And then each of them says to add, it should be in such a sequence.

Sequence of operations: 1. The order of operation of the four decimal operations is the same as that of the four integer operations.

2. The order of operation of the four rules of fractions is the same as that of the four rules of integers.

3. Mixed operation: the same level operation is calculated from left to right, and the order of operation can be flexibly changed. Two-level operations multiply and divide first, and then add and subtract. When there are parentheses, count the inside of the parentheses first, then the inside of the middle brackets, then the inside of the curly braces, and finally the outside of the brackets.

5. The first level of operation: addition and subtraction are called the first level of operation.

6. Second-level operations: Multiplication and division are called second-level operations.

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In an equation, there is addition, subtraction, multiplication and division, multiplication and division first, and then addition and subtraction.

In an equation, there is addition and subtraction, and there is multiplication and division, and what should be counted first, and then what should be calculated.

Addition and subtraction are the same level of operation, from left to right, if there are parentheses, do the parentheses first. In general, in a multi-level equation, the calculation is based on the order of "multiplication first, then multiplication and division, then addition and subtraction", while the order of sibling operations in polynomials is the same. Multiplication and division are calculated together in the same step.

In sibling operations, it is calculated in the order in which it is performed.

Addition is one of the four basic operations, which refers to the calculation of combining two or more numbers and quantities into one number or quantity. The symbol for addition is the plus sign "+", and when adding, the items are connected with a plus sign.

There is a mantra in elementary school: "Multiply and divide first, then add and subtract".

Addition, subtraction, multiplication and division are calculated first and then addition and subtraction.

Multiplication and division are added and subtracted first.

There are parentheses before parentheses.

Multiplication and division first, addition and subtraction later...

Count the watermelon first, that is, multiply and divide.

Relationship between division and subtraction:

1. Divisible division.

Division can be seen as subtraction of the same number of empty stools in succession; Dividend.

It is the number that is subtracted, the divisor is the subtraction of the same change, and the maximum number of consecutive subtractions is the quotient.

For example: 24 6 4, this equation can mean that 24 contains 4 6s, and you can also subtract the same number 6 from 24 consecutively, and subtract 4 times just to complete, that is, the final result is zero, which can be expressed as.

2. The division that can be divisible without checking the loss.

Division can be seen as subtraction of the same number continuously; The dividend is the subtracted number, the divisor is the same subtraction, and the maximum number of consecutive subtractions is the quotient, the remainder of the division.

This is the final result value of subtraction.

For example, the quotient of division: 25 6 is 4 and the remainder is 1

It can also be expressed as a subtraction form: 25 6 6 6 6 1

The calculation method is different, and the mathematical symbols used represent different meanings. In the calculation rules, the divisor cannot be 0, but the subtraction can.

There are no parentheses, and the order of operation is multiplication and division first, then addition and subtraction. If there are parentheses, count the ones in the brackets first, and then the ones outside the brackets.

Four mixed operations: first calculate multiplication and division, then add and subtract, there are parentheses to calculate the brackets in a formula, there is addition, subtraction, and let the stool have multiplication, division, according to the order of operation of the four mixed operations, it can be known: to calculate multiplication and division first, and then calculate addition and subtraction So the answer is:

Multiplication, division, addition and subtraction.

Summary: In the four mixed operations: when there is only one level of operation, the calculation is from left to right; When there are two levels of operation, multiplication and division are calculated first, and then the leakage ruler is calculated to add and subtract When there is a layer of brackets, the brackets are counted first; When there are multiple parentheses, count the square in the parentheses first

What does addition, subtraction, multiplication and division count first? Addition, subtraction, multiplication, and division are calculated first, and addition and division are calculated last. If there are parentheses in the equation, count inside the parentheses first, then outside the parentheses. Examples:

Addition, subtraction, multiplication and division are the basic four operations, and the symbol is "+ In the absence of parentheses, the order of operation is multiplication and division first, then addition and subtraction. +" is the plus sign, and the numbers before and after the plus sign are pluses, and "= is the equal sign, and the numbers after the equal sign are and.

100 (plus) + (plus) 300 (plus) = (equal to sign) 400 (and).