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Because by definition, there sum will always be zero. Because the definition of opposites are additive inverses.

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Q: Why is the sum of two opposites easy to calculate?
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Related questions

What is the sum of two opposites combined in math?

Zero


What is the sum of two integers that are opposites justify the answer?

It is zero and that is simply because that is how additive opposites are defined.


What is the sum of two opposites?

If the negative has a greater absolute value, the sum will be negative. If the positive has a greater absolute value, the sum will be positive.


What are the opposite numbers that add to 100?

"Opposites" cannot mean additive opposites since, by definition, their sum must be 0. So "opposites" is likely to mean multiplicative opposites. This gives the equation x + 1/x = 100 Then the two numbers are 0.010010 and 99.989999 to 6 dp.


How do you calculate two thirds of a sum?

Multiply it by two, then divide that by three.


The sum of two negative numbers?

Placing a question mark at the end of a phrase does not make it a sensible question. Try to use a whole sentence to describe what it is that you want answered.One possible answer to the question, as asked, is that the sum of two negative numbers is easy to calculate.


How do you calculate the arithmetic mean of two numbers?

You add the two numbers together, then divide the sum by two.


How do you calculate integers?

the sum of two consecutive integers is -241, what is the larger integer?


How do you calculate the sum of numbers between two numbers?

If the question is asking for the sum of natural numbers between two members of N, then you will have to add all the natural numbers between the two numbers (excluding the actual two numbers). For example, if they ask you to calculate the sum between 2 and 5, your answer should be 3+4=7.


Definition of Sum or difference of two cubes?

That means that you calculate the cubes of two numbers, and then either add or subtract them.


To calculate sum of 2 numbers?

The sum of two numbers is the result of multiplying those numbers together. It can also be referred to as repetitive addition.


What are the two numbers if the sum of two numbers is 30 and their difference is 6?

Jeez that's easy 12 and 18