Positive minus negative, negative minus positive are equal to what number (positive and negative number)

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• 1. Who can tell me the rules of positive plus negative, negative plus positive, positive minus negative, negative minus positive? It's better to give another example
• 2. Positive minus negative Why subtracting a negative number equals the opposite of adding a negative number Case 7 - (- 3) = 7 + 3
• 3. Is it right to add a negative number equal to minus the corresponding positive number and subtract a negative number equal to plus the corresponding positive number? —3 — —5 =
• 4. How to calculate negative minus negative -1613-（-2700）=?
• 5. How do negative minus negative count For example: - 3 - (- 2) =? Is it - 5 or - 1? Why? Please write down the steps and related knowledge
• 6. Negative minus negative equals?
• 7. Operation of negative numbers Please tell us how to add, subtract, multiply and divide negative numbers, how to calculate the power, how to mix rational numbers, what is the opposite number, what is the absolute value? Let's talk about it in detail. Well, give 20 points. Not much The reward has been raised. 40 points. It's really important for me to be more specific.
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• 15. Pack oranges in baskets with 30kg as the standard. The excess kilogram is a positive number and the insufficient kilogram is a negative number. The weighing records are as follows: 5, - 4, + 1, 0, - 3, - 5, + 4, - 6, + 2, + 1? How many kilos are 10 baskets of oranges?
• 16. Five step calculation of plus and minus of positive and negative numbers We need 20 additions and subtractions
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• 18. On positive and negative numbers in the first day of junior high school There are two points a and B on the vertical axis. The distance between a and B is 1, and the distance between a and origin 0 is 3. Find the sum of the distances between B and origin that meet the conditions? (Note: the distance in the question can be positive or negative.) The wrong type is the number axis, not the vertical axis
• 19. About positive and negative numbers There are four numbers: 3, - 5,7, - 13. Through calculation, we can calculate 24,,,, addition, subtraction, multiplication and division, as well as brackets, as long as we can get 24. It's better to have a variety of algorithms, one of which can also
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