Asked by Denise
When solving equations by adding integers, what does it mean when one number is in parenthisis? Do you do something different when they are in parenthisis? Example below:
36 + (-28) + (-16) + 24 = y
Thank you
Numbers in parenthesis means the number is what it is. In the example, the number reads NEGATIVE sixteen. The - sign means negative, not minus. Reading the problem yields:
thirty-six plus a negative twenty-eight plus negative sixteen plus twenty-four.
when adding numbers, the elementary rule is to add like signed numbers
36+ 24 = 60
-28-16= - 44
Then subtract, taking the sign of the larger
60- 44= +16
This is the rule we learn in elementary school. Later, we learn we can go left to right with the same process
36 + (-28) + (-16) + 24
36 + (-28)=8
8 -16= -8
-8+ 24= +16
36 + (-28) + (-16) + 24 = y
Thank you
Numbers in parenthesis means the number is what it is. In the example, the number reads NEGATIVE sixteen. The - sign means negative, not minus. Reading the problem yields:
thirty-six plus a negative twenty-eight plus negative sixteen plus twenty-four.
when adding numbers, the elementary rule is to add like signed numbers
36+ 24 = 60
-28-16= - 44
Then subtract, taking the sign of the larger
60- 44= +16
This is the rule we learn in elementary school. Later, we learn we can go left to right with the same process
36 + (-28) + (-16) + 24
36 + (-28)=8
8 -16= -8
-8+ 24= +16
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