Home › CAASPP Mathematics › Mathematics › Foundations › Simplify both 9 - (-15) and 9 + 15, and compare …
Simplify both 9 - (-15) and 9 + 15, and compare the results.
ABoth expressions equal 6
BBoth expressions equal -24
C9 - (-15) differs from 9 + 15
DBoth expressions equal 24
Answer & Solution
Correct answer: D. Both expressions equal 24
1. Simplify the first expression using the subtraction property: 9 minus negative 15 becomes 9 plus 15.
2. 9 plus 15 equals 24.
3. Simplify the second expression directly: 9 plus 15 also equals 24.
4. Both expressions equal 24, confirming that subtracting a negative number is the same as adding its positive opposite.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 1 "Foundations", section 1.3 Add and Subtract Integers_
Related questions
Simplify by combining like terms: 3x squared + 7x + 9 + 7x squared + 9x + 8.Is zero a positive number or a negative number?Add: 37 + (-53).Simplify: 30 divided by 5, plus 10 times (3 minus 2).The saying "Please Excuse My Dear Aunt Sally" helps students remember what?List the multiples of 9 and the multiples of 12. What is the first number to appear on botFind the prime factorization of 80.Check 4,962 with the divisibility tests for 2, 3, 5, 6, and 10. Which complete list of tho