Subtraction: The operation of finding another addend by knowing the sum of two numbers and one addend.
Subtraction is the inverse of addition, and addition is the inverse of subtraction. Addition and subtraction are both first-order operations.
Question 2: What is subtraction? What kind of operation is subtraction? Subtraction is one of the four operations, and the operation of subtracting one quantity from another is called subtraction; Given the sum of two addends and one of them, the operation of finding the other addend is called subtraction.
The symbol of subtraction is "-",which is pronounced as negative sign. Used to calculate decrement.
"-"is the minus sign, the number before the minus sign is the minuend, the number after the minus sign is the minus sign, "=" is the equal sign, and the number after the equal sign is the difference.
10000 (minuend)-(minus sign) 6000 (minus sign) = (equal sign) 4000 (difference)
Question 3: Definition of subtraction Mathematical subtraction is the operation of knowing the sum of two addends, and one of them finds the other addend. In subtraction, the sum of two addends is called minuend, the known addend is called subtraction, and the obtained addend is called difference. For example: 258-42=2 16, 258 is the minuend, 42 is the reduction, and 2 16 is the difference. The symbol "-"is called the minus sign. Please read more books for primary school students.
Question 4: What does subtraction mean? I have to admit that boys and girls are often different in love.
Boys play the deduction system. At the beginning of a relationship, he can't see your shortcomings. He will always give you 100 points. Your eyebrows are too thick and your arms are too fat. It doesn't matter. As long as he begins to fall in love with you, you are an out-and-out luminous body and you are perfect. You ask the pig, do you love me? Do I have any shortcomings? He said, how can there be shortcomings? The little boy in love, the kind of * * * that doesn't care about the sky and the ground will burn for a while.
Of course, this situation will last for some time. After the initial love period, the hormones in the brain subsided a little, and the score reduction system started. He began to think that sometimes you are a little demanding and sometimes you are too clingy. When quarreling, it would be better if you knew how to give in. He thinks you can really lose weight.
Even he doesn't know, he has already deducted points for you, and you are no longer so perfect in his eyes. You only have 80 points now; When you are hated by his buddies, you only get 70 points; You still check his phone list online every day. Well, it's only 60 points now. For you whose grades are not very high, he gradually loses patience as before, always coaxing you and letting you go. Now it's your turn to be dissatisfied. You feel that he doesn't love you as much as before. You feel cheated, cheated, so your temper is getting worse and worse, and your behavior is getting less and less cute ... He continues to deduct points from you. So far, you have failed.
It doesn't matter who proposed the breakup, whether he proposed it or you proposed it. He brought it up because he felt that you were no longer suitable and there was no need to be together. The fundamental reason you brought it up is because you think he is not as good to you as before.
What a pity, isn't it? But what can we do? This is the difference between men and women. Boys play MINUS points and girls play plus points. It is often seen that when a girl just falls in love, she still has some regrets about that boy. If only he were taller and more handsome. Later, girls can no longer see the shortcomings of boys, even if boys are unbearable in the eyes of others, they are perfect in her eyes, because girls play with the bonus system, and they will not be rational if they are emotional.
So in this emotional model that was perfect at first and then drifted away, in fact, the girl was the most painful. They didn't understand why he was good to me at first, but then they went bad. They don't understand, it's some small places in daily life, which accumulate over time and make him start to punish you with bad use in an attempt to change you. And your communication system with him is completely incompatible, and you didn't receive these messages at all. You are more and more unlovable in confusion, anxiety and self-pity, and he no longer loves you.
All girls will experience this kind of love.
No external force, no third party, but love is gone.
So what should we do? Just do this:
1. First of all, we must understand that love is not once and for all, and boys play with the deduction system.
2. When his deduction system starts, there will always be some clues. Don't be too careless. Knowing what kind of girl he likes and what kind of performance is his taboo. Just avoid it.
3. Constantly enrich yourself. When you become a more and more outstanding girl, even if she reduces your points in some places, she will add them back in other places.
So your grades won't be bad.
Besides, the good news is that boys are not so harsh. If you score about 80, he will be glad that he has found the best GF, because when he calms down, he also knows that no girl is perfect. He is getting better and better to you. You feel his love and treat him more in the way he likes. This is how the virtuous circle begins.
The so-called beautiful and long-term love that everyone envies is, in the final analysis, such a thing.
Question 5: What is the essence of subtraction? The essence of subtraction:
Negative-negative = difference
Negative difference = negative
Subtraction+difference = minuend
If you subtract two numbers from a number continuously, you can subtract the sum of the two numbers, or you can subtract the second number first and then the first number.
a-b-c=a-(b+c)=a-c-b
1. Subtract a number from a number and add the same number to a number, which means (a-b)+b = a. 。
2. Add a number to a number and subtract the same number, and a number remains unchanged, that is, (a+b)-b = a. 。
3. If you subtract a number from the sum of n numbers, you can subtract this number from any addend (if it can be subtracted) and then add it to other addends, such as (a+b+c)-d = (a-d)+b+c. 。
4. If you subtract the sum of n numbers from a number, you can subtract each addend in the sum from this number in turn, such as A-(B+C+D) = A-B-C-D. 。
5. If a number subtracts the difference between two numbers, you can subtract the minuend in the difference from this number (if you can subtract it) and add the minuend in the difference; Or add subtraction in the difference first, and then subtract the minuend in the difference, that is, a-(b-c) = a-b+c or a-(b-c) = a+c-b.
6. Subtracting two numbers in a row from a number is equivalent to subtracting the sum of these two numbers. a-b-c=a-(b+c)
Question 6: What is abdication subtraction? Subtraction by abdication (also called subtraction by borrowing) means that when two numbers are subtracted and the number of digits to be subtracted is not enough, borrowing the previous digit is equivalent to adding 10 to this digit and then calculating. For example: 2 1-9=?
Everyone in 2 1 is 1. You can't subtract 9 (not enough) from the decimal number of 2 1 and borrow 1 (because you borrow the decimal number of 2 1, it becomes1), 1 1.
Question 7: What is continuous subtraction? a-b-c=a-(b+c)
A number MINUS two numbers in a row can be equal to the sum of this number MINUS two numbers, and the number remains the same.