There is addition, subtraction, multiplication and division in an equation, which should be calculat

In the absence of parentheses, the order of operations is multiplication and division first, then addition and subtraction.

1. Addition: +" is the plus sign, the number before and after the plus sign is the plus number, "=" is the equal sign, and the number after the equal sign is and.

100 (plus).

plus) 300 (plus).

Equal to the sign) 400 (and).

2. Subtraction: -" is the minus sign, the minus sign is preceded by the subtracted number, followed by the minus number, "=" is the equal sign, and the number after the equal sign is the difference.

1000 (subtracted).

minus) 300 (minus).

Equal to the sign) 700 (difference).

3. " is the multiplier sign, the number before and after the multiplication sign is called the factor, "=" is the equal sign, and the number after the equal sign is called the product.

10 (factor).

multiplication) 200 (factor).

Equal to the sign) 2000 (product).

4. " is the division sign, the division sign is preceded by the dividend, followed by the divisor, "=" is the equal sign, and the number after the equal sign is the quotient.

100 (dividend).

2 (divisor) 50 (quotient).

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

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. Those with parentheses should be counted in parentheses first, and then outside the parentheses. If there are addition, subtraction, multiplication and division operations in parentheses, the multiplication and division in the parentheses are calculated first, and then the addition and subtraction in the parentheses are calculated.

1. Addition. +" is the plus sign, and the number of the sail surface before and after the plus sign is the plus number, and "= is the equal sign, and the number after the equal sign is the and.

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

2. Subtraction touches.

is a minus sign, the minus sign is preceded by the subtracted number, followed by the minus number, "= is the equal sign, and the number after the equal sign is the difference.

3. Multiplication. "is a multiplier sign, and the numbers before and after the multiplication sign are called factors," = is an equal sign, and the numbers after the equal sign are called products.

10 (multiplier) 200 (factor) = (equal) 2000 (product).

4. Division. "is the division sign, the division sign is preceded by the dividend, followed by the divisor," = is the equal sign, and the number after the equal sign is the quotient.

100 (dividend) 2 (divisor) = 50 (quotient).

1000 (subtracted) - (minus) 300 (minus) = (equal to sign) 700 (difference).

When there is addition, subtraction, multiplication and division in the equation, the order of operation is to calculate the multiplication and division first, then add and subtract, if there are parentheses, calculate the data in the parentheses first.

In mathematics, an equation refers to a formula listed when performing calculations of numbers or wild algebraic formulas, including the letters and operation symbols of numbers or substitute numbers. According to the different calculation methods, the calculation formula is generally divided into horizontal and vertical types. with expressions.

Differently, expressions are used to be the same type of data, such as constants.

Variables, functions, etc., are formulas that are connected by certain rules with operator symbols.

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.

In life, there is a harvest that will benefit people for a lifetime, that is, the harvest of reading; In life, there is an experience that is unforgettable, and that is the experience of reading. It is reading that allows me to learn to live in the hazy world and mobilize the accumulation of colorful and splendid life to shape life, shape myself, shape ideals, and shape the ...... of lifeSo, in my life journey, I have such an evocative reading experience.

In the hustle and bustle of the city, people often forget many primitive instincts and needs of life. Cars have replaced walking, television has replaced observation, and the Internet has replaced communication. We do not deny progress, but we know that there are things that can never be replaced, such as a piece of pure nature, like an old book turned yellow, like a classic old song.

Even if we already have the fashionable appearance of the E era, in the deepest part of our hearts, maybe we are still obsessed with the elegance of red sleeves and fragrance, the humor of green plum boiled wine, and the tranquility of reading on a rainy night.

Remember, when I was a child, it was fun. And because of this, I got into trouble and was fathered.

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.

Multiply and divide first, then add and subtract, and if there are parentheses, the brackets will be counted first, and then the outside of the brackets.

Multiply and divide first, then add and subtract. There are parentheses before parentheses.

When there is multiplication and division, multiply and divide first, then add and subtract, and when there are parentheses, brackets 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:

It's multiplication and division first, then addition and subtraction.

Multiply first, then multiply and divide, add and subtract last, and if there are parentheses, the calculation in parentheses will be carried out first. Sibling arithmetic, from left to right.

For example, +2x3=7: In this equation, the multiplication should be calculated first, i.e. 2x3=6, and then the addition should be calculated that is, 6+1, and the result should be finally obtained: in this formula, the parentheses should be calculated first, that is, (5+2)=7, and then x3, and finally the result +3-2=2:

In this formula, it is only necessary to add and subtract in order, and finally get the result 2.

Add and subtract is called a first-level operation, and multiplication and division are called second-level operations.

If there is only sibling arithmetic, it is calculated from left to right.

In the case of heterogeneous operations, multiply and divide first, then add and subtract.

When there are parentheses, the ones in the parentheses are counted first, then the ones in the parentheses, and finally the ones outside the parentheses.

If there are no parentheses, multiply and divide first, then add or subtract, if there are parentheses, do the content in the parentheses first, and then do the content outside the parentheses, such as: 1+2+3*4=1+2+12=15

Addition, subtraction, multiplication, and division are collectively referred to as the four operations.

Among them, addition and subtraction are called first-level operations; Multiplication and division are called second-order operations:

In sibling operations, it is calculated from left to right;

In two-level operations, multiplication and division are calculated first, and addition and subtraction are calculated later.

When there are parentheses, count the inside of the brackets first, and then the outside of the brackets;

When there are multiple parentheses, count the ones in the small brackets first, then the inside of the middle brackets, and finally the outside of the brackets.

In a mixed operation, the number in parentheses is counted first, from the smallest to the largest, and if there is a power, the power is calculated first, and then from the advanced to the lowest.

There are parentheses to count the inside of the parentheses first, then multiplication and division, and finally addition and subtraction.

Of course, it is multiplied and divided first, and then added and subtracted.

Multiply and divide first, then add and subtract, and the parentheses are counted in the parentheses first.

The premise without parentheses is to multiply and divide first and then add and subtract, and those with parentheses are counted in the brackets first, and then multiply and divide first and then add and subtract.

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

Why do I remember when I was a child, my teacher taught me to add and subtract first?