Yes.
-5C is colder than -1C
6 degrees Celsius
1 - 4 = -3 degrees Celsius.
At -40 they're the same. Neither is colder, they are scales of measurements for temperature. Those are two scales of temperature. Neither can be defined as being colder. One could say that Fahrenheit is the "colder" scale because -1 degree Fahrenheit is colder than -1 degree Celsius. The "coldest" scale I know of is Kelvin, which defines 0 degrees Kelvin as -273.15 degrees Celsius (Absolute Zero).
Four degrees below zero celsius (or -4 degrees C) is nine degrees less than 5 degrees C.
Because the Antarctic continent is a land mass covered with an ice sheet, and the Arctic is simply frozen sea ice, Antarctica is about -1 degree C (30 degrees F) colder than the Arctic.
-8
1 degree, C. is colder than 7 degrees, C.
1 degree Fahrenheit is -17.22 degrees Celsius. 1 degree Celsius is 33.8 degrees Fahrenheit. It seems that 1 degree Celsius is hotter.
Yes
Yes.
Temperature in Celsius can be negative. 0 degrees is freezing point in Celsius, so it is possible to get -1, -10 degrees, etc. However, not all temperatures in Celsius are negative.