Use these three steps
(A) Add 40 (B) times 9/5 (C) Take away 40
Thus 70 + 40 = 110
110 x 9/5 = 198
198 - 40 = 158 def F
You can use the steps in reverse for deg F to Deg C (div by 9/5 or mult by 5/9)
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Both Fahrenheit and Celsius are ways of measuring temperature. Both are measured in degrees. Water freezes at thirty-two (32) degrees Fahrenheit and zero (0) degrees Celsius.
Water boils at a temperature of 100 degrees Celsius, or 212 degrees Fahrenheit.
32 Degrees Fahrenheit 0 Degrees Celsius
The temperature at which water freezes. Also, it is equal to 0 degrees Celsius, or 270 degrees on the Kelvin scale.
On the Fahrenheit scale. Water freezes at zero on the Celsius scale.