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The temperature at noon was –12°C. In the next 9 hours, the temperature dropped 8°C. What is the temperature at 9 p.m.? A. –20°C B. –4°C C. 4°C D. 20°C
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@EclipsedStar
If the temperature at noon was : -12 degrees celcius Then AFTER 9 hours (so noon + 9 hours would be 9pm) the temperatured DROPPED 8 degrees celsius. This means that to find the temperature at 9pm you would simply subtract 8 from -12. So -12 -8 = ?
4
think of it like this: you are 12 dollars in debt and you spend 8 more dollars (so you go further into debt)
that's how I think of -12 - 8
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