100 75 plus 25 counts first and then counts

1. Calculate in order: first calculate: 100-75=25, then 25+25=502, plus brackets to calculate: first add brackets to the equation to become: 100-(75-25), first calculate 75-25=50, and then calculate 100-50=50

This question examines the flexible use of addition and subtraction.

100-75+25, the same level operation is, from left to right, first calculate 100-75 = 25, then calculate the difference of 100-75 plus 25, that is, 25 + 25 = 50, so 100-75 + 25 = 50.

Arithmetic operations refer to addition, subtraction, multiplication, and division, but sometimes include more advanced operations (e.g., percentages, square roots).

Take powers and logarithms.

The arithmetic is performed in the order of operation, and there is no set of four operations that can be added, subtracted, multiplied, and divided.

except for dividing by zero), and all four operations are in accordance with fundamental axioms and can be called a field.

100-75 plus 25 first calculate the subtraction 100-75 = 25, then calculate the addition 25 + 25 = 50

The order of operations is a mathematical term. It is mainly multiplied first, then multiplied and divided, and finally added and subtracted, and the calculation in parentheses is carried out first. Sibling arithmetic, from left to right.

Multiplication and division are not involved in this problem, only addition and subtraction. So just calculate the addition and subtraction in order. Subtraction first, then addition. The final result is 50.

Extended data: Change the order of operations.

In addition and subtraction, the order of operations can be changed, for example: 3-8+5, can be changed to 3+5-8, move 5 to the front of -8, and move it with the previous operator symbols, changing the order of operations is nothing more than to make the operation simpler.

About the multiplication sign omitted:

The " between numbers and letters and the " between letters " " can be omitted and not written.

Numeric formulas are generally not omitted, for example, 2 (a+4) can be omitted, and 2 (4+4) is generally not omitted. At the same time, the multiplication sign between numbers and numbers cannot be omitted or written, for example, "5 3" cannot be learned as 53, otherwise "5 3" and 53 will be confused, and students will naturally understand.

Subtraction first, then addition.

The first step is to calculate the subtraction of 100-75, 100-75=25;

The second step is to calculate the addition of 25+25; 25+25=50。

Addition and subtraction calculations need to follow the order before and after, if there are parentheses, the inside of the brackets will be counted first, and if there are no parentheses, the first will be counted first, and the last will be counted. In the absence of parentheses, the order of operations is multiplication and division first, then addition and subtraction.

Extended information: 1. "+ 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.

2. "- 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.

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.

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.

Calculate the subtraction first before calculating the addition, and the calculation process is as follows:

Subtraction calculations:The sum of several numbers is subtracted by a number, and you can subtract this number from any of the additives, and then add it with the rest of the additives. For example:

Subtract several numbers from a number in a row, you can first add all the subtractions, and then subtract the sum of the subtractions from the subtracted numbers. For example: 276-115-85=276-(115+85)=76.

Sibling operations, the first and second numbers are calculated first, and the third number is calculated with the results of the first and second numbers.

Different levels of operations, multiplication and division first, then addition and subtraction, and those with parentheses are counted in parentheses first.

Of course, it's from the front to the back.

Subtraction first, then addition.

Example: 100-75+25=50

Addition and subtraction are calculated sequentially.

If there is a wise addition and subtraction and multiplication and division in the formula, the multiplication and division are calculated first, and then the addition and subtraction are calculated.

Example: 50*2+15 3=30

Hello! 1. First count 5+6

2. Calculate 20+ again

This is a single digit minus a single digit.

Ten minus ten.

Together, it is.

Count 15-8 first, then add 60

Calculate 70-40=30 first, then 30+5=35

I hope it can help you, correct answer, click [Answer], thank you for your likes or my motivation to continue to help others!

Calculate 20 + 40 = 60 first

Calculate 60 + 5 = 65

Hope mine is helpful to you, satisfied, thank you.

Here's how I told my child, counting from 8 to 25, how much in my hand (my child is in kindergarten).

When 226x23 is 226, 3=678 is counted first.

Then count 226 20 = 4520.

Plus 678 + 4520 = 5198.

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

There is neither multiplication and division nor parentheses in this problem, and you can directly add and subtract them.

100 Pi 37 63

1. Calculate in order: first calculate: 100-75=25, then 25+25=50

2. Add brackets to calculate: first add brackets to the equation to: 100-(75-25), first calculate 75-25=50, and then calculate 100-50=50

This question mainly tests the flexible use of addition and subtraction operations.

Addition and subtraction are calculated first, first 200 100, then 300 56, and 244 is obtained

Subtraction first, then addition. Calculation method: 100-43+28=85.

1.The calculation rule of integer addition: the same digits are aligned, from the low digits, which digit is added to the full ten, and the previous digit is blind to one.

2.Integer subtraction calculation rule: the phase grasp is aligned with the digits, subtract from the low position, which digit is not enough to reduce the number on the Tongluo Qing, and retreat from its previous digit to make ten, and merge the number on the standard together, and then subtract.

100-20 has 80 left, and subtract 7 to leave 63. Finished.