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Question
(-10) - (+10) + (+10) + (-10) - (-10) + (+10) = _________.
(-10) - (+10) + (+10) + (-10) - (-10) + (+10) = _________.
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Solution
The correct option is A 0
(−10)−(+10)+(+10)+(−10)−(−10)+(+10)
First solve the brackets and then perform addition or subtraction to get the result. When the sign inside the bracket and outside the bracket is same, then it results in a plus sign and When the sign inside the bracket and outside the bracket is different, then it results in a minus sign. This can be seen in following ways.
=−10−10+10−10+10+10
Let's group the negative and positive terms.
=−10−10−10+10+10+10
=−30+30
=0
(−10)−(+10)+(+10)+(−10)−(−10)+(+10)
First solve the brackets and then perform addition or subtraction to get the result. When the sign inside the bracket and outside the bracket is same, then it results in a plus sign and When the sign inside the bracket and outside the bracket is different, then it results in a minus sign. This can be seen in following ways.
=−10−10+10−10+10+10
Let's group the negative and positive terms.
=−10−10−10+10+10+10
=−30+30
=0
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