It was 13°C yesterday but the temperature changed by -18.6° overnight. What is the temperature now?

The temperature now would be:

13°C - 18.6°C = -5.6°C

To find the current temperature, we need to subtract the change in temperature from the temperature yesterday.

Temperature yesterday: 13°C
Change in temperature: -18.6°C

To find the current temperature, we can use the following formula:

Current Temperature = Temperature Yesterday + Change in Temperature

Plugging in the values, we get:

Current Temperature = 13°C + (-18.6°C)

Adding the numbers, we get:

Current Temperature = -5.6°C

Therefore, the temperature now is -5.6°C.

To find the current temperature after the change, we need to subtract the change in temperature from the initial temperature.

The initial temperature was 13°C, and the change in temperature is -18.6°C. When we subtract -18.6°C from 13°C, we can think of it as adding a positive value (since subtracting a negative is the same as adding a positive).

So, 13°C + (-18.6°C) = -5.6°C.

Therefore, the current temperature is -5.6°C.