ENGLISH

22•‹C
EXERCISE 34-ORAL: Change the Fahrenheit temperatures to Celsius by choosing
temperatures from the list. Then describe the temperature in words.
Thermometer
FARENHEIT
1. 50•‹F
2. 32•‹F
3. l0ODF
4. 75'F
5. O0F
CELSIUS
10•‹C
DESCRIPTION
cool, chilly
"F "C
50"
40'
30'
20"
1 o0
0"
-10"
-20"
-30"
-40" -40"
-60'~ -50D
I
above freezing
freezing
below freezing
EXERCISE 35: "Approximate" means "close but not exact." Here is a fast way to get an
approximate number when you convert from one temperature system to another.*
I
TO change Celsius to Fahrenheit: DOUBLE THE CELSIUS NUMBER AM) ADD 30.
Examples: 12'C x 2 = 24 + 30 = 54'E (Exact numbers: 12OC = 53.6"E)
20•‹C x 2 = 40 + 30 = 70•‹E (Exact numbers: 20•‹C = 68OE)
35'C x 2 = 70 + 30 = 100•‹E (Exact numbers: 35OC = 95OF)
To change Fahrenheit to Celsius: SUBTRACT 30 OM THE FAHREN~ NUMBER
AND THEN DMDE BY 2.
Examples: 60•‹F - 30 = 30 - 2 = 15•‹C. (Exact numbers: 60•‹F = 15.6OC.)
80•‹F - 30 = 50 - 2 = 2S•‹C. (Exact numbers: 80•‹F = 26.7"C.)
90•‹F - 30 = 60 - 2 = 30•‹C. (~xact numbers: 90•‹F = 32.2T.j
Change the following from Celsius to Fahrenheit and Fahrenheit to Celsius. Calculate the
approximate numbers.
1. 22•‹C
+ = approximately 74'F (2Z•‹C x 2 = 44 + 30 = 74OF)
2. 2•‹C 6. 45OF
3. 30•‹C 7. 70•‹F
4. 10•‹C 8. 58'F
5. 16OC 9. 100•‹F
*To get exact numbers, use these formulas: C = 519 (OF -32) OR F = 915 (OC) + 32.
EXPRESSING PRESENT TIME (PART 1) W 75