Question

the temperature changed from 5°c at 6pm to -2°c at midnight .how much did the temperature decrease

Answer 1

it decrease by 7 because 5 - 7= -2

Answer 2

The temperature decreases by 7°C at midnight. The difference between the temperature at 6 pm and midnight gives how much the temperature is decreased.

How to calculate the difference between temperatures?

Generally, low temperatures are given by the negative values. So, to know how much it is decreased from the normal conditions, subtract the numerical values of temperatures (including negative signs). This results in a value which is the required decrease in temperature.

Calculation:

Gien temperatures are,

At 6 pm, 5°C and at midnight -2°C

So, the difference is

5°C - (-2°C)

⇒ (5 + 2)°C

∴ 7°C

Thus, the temperature of 7°C is decreased by midnight from 6 pm.

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