SOME COUNTING UNITS
1 dozen = 12 (Abbreviation: dz)
1 baker’s dozen = 13
1 score = 20
1 gross = 144 (12 dozens) (Abbreviation: gr)
1 ream = 500 (Abbreviation: rm)
ANGLE MEASURE
1 second = 
minute
1 minute = degree
1 degree = 
of a circle
SYMBOLS: Degree: ° Minute: ‘ Second: "
← 1 degree = 1°
← 1 right angle = 90° = 1/4 of a circle
← 1 straight angle = 180° = 1/2 of a circle
A protractor is typically used to measure angles:
UNITS OF TEMPERATURE
- The Degree is used as the basic unit of temperature; however, there are several temperature scales commonly used. Two will be discussed here: Fahrenheit and Celsius.
| Degrees Fahrenheit: | Math Symbol: F° <Read: "degrees Fahrenheit"> |
| Degrees Celsius: | Math Symbol: C° <Read: "degrees Celsius"> |
- If you are given degrees Celsius (C) and want degrees Fahrenheit (F), use this formula to convert the values:
F = 
C + 32
- If you are given degrees Fahrenheit (F) and want degrees Celsius (C), use this formula to convert the values:
C = 
(F – 32)
Examples of these conversions will be done in another Lesson.