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These numbers are easy to memorize and will allow you to make quick conversions. Memorize Celsius to Fahrenheit using multiples of 10:  0 degrees Celsius equals 32 degrees Fahrenheit. 10 degrees Celsius equals 50 degrees Fahrenheit. 20 degrees Celsius equals 68 degrees Fahrenheit. 30 degrees Celsius equals 86 degrees Fahrenheit. 40 degrees Celsius equals 104 degrees Fahrenheit. These numbers are fairly easy to memorize and will allow you to make precise conversions.Memorize Celsius to Fahrenheit using multiples of 5:  -5 degrees Celsius equals 23 degrees Fahrenheit. 5 degrees Celsius equals 41 degrees Fahrenheit. 15 degrees Celsius equals 59 degrees Fahrenheit. 25 degrees Celsius equals 77 degrees Fahrenheit. 35 degrees Celsius equals 95 degrees Fahrenheit. Memorize Fahrenheit to Celsius using multiples of 10 to perform rough conversions:  32 degrees Fahrenheit equals 0 degrees Celsius. 40 degrees Fahrenheit equals 4.4 degrees Celsius. 50 degrees Fahrenheit equals 10 degrees Celsius. 60 degrees Fahrenheit equals 15.5 degrees Celsius. 70 degrees Fahrenheit equals 21.1 degrees Celsius. 80 degrees Fahrenheit equals 26.6 degrees Celsius.
Learn rough comparable temperatures by heart. Learn comparable temperatures by heart. Learn comparable temperatures by heart.