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Questions and Answers
What is the result of the expression $4 - (-9)$?
What is the result of the expression $4 - (-9)$?
- -5
- 5
- -13
- 13 (correct)
Calculate the value of $15 - (-58)$.
Calculate the value of $15 - (-58)$.
- 73 (correct)
- -73
- 43
- -43
What is the outcome of $-21 + (-9)$?
What is the outcome of $-21 + (-9)$?
- 30
- -12
- -30 (correct)
- 12
What is the result of the expression $16 + (-11)$?
What is the result of the expression $16 + (-11)$?
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When evaluating $4 - (-9) + 15 - (-58)$, the final result is?
When evaluating $4 - (-9) + 15 - (-58)$, the final result is?
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What is the result of $4 + 9$?
What is the result of $4 + 9$?
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Evaluate the expression $15 + 58$.
Evaluate the expression $15 + 58$.
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What is the value of $-21 - 9$?
What is the value of $-21 - 9$?
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Calculate $16 - 11$.
Calculate $16 - 11$.
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What is the sum of $4 + 15 + 9 - 58$?
What is the sum of $4 + 15 + 9 - 58$?
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Study Notes
Basic Operations with Negative Numbers
- Subtracting a negative number is equivalent to addition; thus, ( 4 - (-9) = 4 + 9 = 13 ).
- For ( 15 - (-58) ), apply the same principle: ( 15 + 58 = 73 ).
- Adding two negative numbers: ( -21 + (-9) = -21 - 9 = -30 ).
- Adding a positive and a negative number: ( 16 + (-11) = 16 - 11 = 5 ).
Combined Expression Evaluation
- The overall expression ( 4 - (-9) + 15 - (-58) ) simplifies as follows:
- Start with ( 4 - (-9) = 13 ).
- Then calculate ( 15 - (-58) = 73 ).
- Combine results: ( 13 + 73 = 86 ).
- Final result of ( 4 - (-9) + 15 - (-58) ) is ( 86 ).
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