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In converting the temperature from Fahrenheit to Celsius the formula is, C = (5/9)(F – 32);
The steps of converting from Fahrenheit to Celsius are reversed here.
Step I: Subtract 32 from the degrees.
Step II: Multiply the result by 5.
Step III: Divide the product by 9.
For Example:
1. Convert 86°F to the Celsius scale.
Solution:
Step I:
Subtract 32 from the degrees.
= 86° – 32
= 54°
Step II:
Multiply the result by 5.
= 54° × 5
= 270°
Step III:
Divide the product by 9.
= 270° ÷ 9
= 30° C
Therefore, 86° F = 30° C
2. Convert 104° F to the Celsius scale.
Solution:
Step I:
Subtract 32 from the degrees.
= 104° – 32
= 72°
Step II:
Multiply the result by 5.
= 72° × 5
= 360°
Step III:
Divide the product by 9.
= 360° ÷ 9
= 40° C
Therefore, 104° F = 40° C
3. Convert 113°F to the Celsius scale.
Solution:
Step I:
Subtract 32 from the degrees.
= 113° – 32
= 81°
Step II:
Multiply the result by 5.
= 81° × 5
= 405°
Step III:
Divide the product by 9.
= 405° ÷ 9
= 45° C
Therefore, 113° F = 45° C
4. Convert 122°F to the Celsius scale.
Solution:
Step I:
Subtract 32 from the degrees.
= 122° – 32
= 90°
Step II:
Multiply the result by 5.
= 90° × 5
= 450°
Step III:
Divide the product by 9.
= 450° ÷ 9
= 50° C
Therefore, 122° F = 50° C
5. Convert the following Fahrenheit into Celsius scale.
(i) 95° F
(ii) 131° F
Solution:
(i) 95° F
We know that C = (F – 32) × \(\frac{5}{9}\)
95° F = (95 – 32) × \(\frac{5}{9}\)
= 63 × \(\frac{5}{9}\)
= \(\frac{315}{9}\)
= 35° C
Hence, 95° F = 35° C
(ii) 131° F
We know that C = (F – 32) × \(\frac{5}{9}\)
131° F = (131 – 32) × \(\frac{5}{9}\)
= 99 × \(\frac{5}{9}\)
= \(\frac{495}{9}\)
= 55° C
Hence, 131° F = 55° C
Worksheet Converting the Temperature from Fahrenheit to Celsius
I. Convert the following Fahrenheit into Celsius scale.
1. 68° F
2. 140° F
3. 86° F
4. 94° F
5. 176° F
6. 122° F
7. 212° F
8. 167° F
9. 77° F
10. 103° F
11. 179° F
12. 209° F
13. 34° F
14. 42° F
15. 54° F
16. 39° F
17. 126° F
18. 67° F
19. 50° F
20. 44° F
21. 201° F
22. 180° F
23. 205° F
24. 200° F
Answer:
1. 20° C
2. 60° C
3. 30° C
4. 34.4° C
5. 80° C
6. 50° C
7. 100° C
8. 75° C
9. 25° C
10. 39.4° C
11. 81.7° C
12. 98.33° C
13. 1.1° C
14. 5.5° C
15. 12.2° C
16. 3.89° C
17. 52.2° C
18. 19.4° C
19. 10° C
20. 6.7° C
21. 93.8° C
22. 82.2° C
23. 96.1° C
24. 93.3° C
Converting the Temperature from Celsius to Fahrenheit.
Converting the Temperature from Fahrenheit to Celsius.
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