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OpenStudy (anonymous):
find the difference 3-(-9)
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OpenStudy (mathstudent55):
-(-a) = a
OpenStudy (anonymous):
can someone help me
OpenStudy (mathstudent55):
-(-a) = a -(-9) = 9
OpenStudy (mathstudent55):
3 - (-9) = 3 + 9
OpenStudy (anonymous):
o thx u wanna help me with more
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OpenStudy (mathstudent55):
Sure. Start a new post, I'll help you there.
OpenStudy (mathstudent55):
To subtract numbers, change the subtraction into an addition, then follow the rules of addition. To change a subtraction into an addition, change minus into plus and change the sign of the second number. Example 1: -3 - (-5) = -3 + 5 = 2 Example 2: 23 - 28 = 23 + (-28) = -5
OpenStudy (anonymous):
i did
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