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5 votes
5 votes
Find ( -18) + ( -15 ) + 10 .

User Otwtm
by
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1 Answer

13 votes
13 votes

Rules in adding integers :

1. Same signs (+)

take the sum of the integers and it is a positive integer

2. Same signs (-)

take the sum of the integers and it is a negative integer

3. Different signs (+ and -)

Take the difference of the integers then follow the sign of the larger number

From the given :


(-18)+(-15)+10

You can work with the integers with the same sign first then proceed with the integers with different signs.

Add integers with the same signs

(-18) + (-15) = -33 (Rule #2)

Now we have :


(-33)+10

Using Rule #3

Take the difference :

33 - 10 = 23

Then the sign will follow the sign of the larger number which is -33

So the answer is -23

User Shabbir Reshamwala
by
2.2k points