jojo12g
  • jojo12g
Which correctly gives the expression using addition? –18.6 – 31.5 A. –18.6 + 31.5 B. 18.6 + 31.5 C. 18.6 + (–31.5) D. –18.6 + (–31.5)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Ddos_Dragon
  • Ddos_Dragon
D BECAUSE -
jojo12g
  • jojo12g
thanks bt explain
Ddos_Dragon
  • Ddos_Dragon
To the negative sign, you must also add an addition sign.

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Ddos_Dragon
  • Ddos_Dragon
I learned that trick, in a course in mathematics. How it works? I don't know. It just works.
Ddos_Dragon
  • Ddos_Dragon
*To add the negative sign
Ddos_Dragon
  • Ddos_Dragon
Then, when adding the two negatives, you get your answer.
Ddos_Dragon
  • Ddos_Dragon
:) My professor was always very vague, I have learned from his ways.

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