Converting the Temperature from Celsius to Fahrenheit

In converting the temperature from Celsius to Fahrenheit the formula is F = (9/5)C + 32.

Steps of converting from Celsius (°C) to Fahrenheit (°F)

Step I: Multiply the number of degree by 9.

Step II: Divide the product by 5.

Step III: Add 32 to the result.

For Example:

1. Convert 40 °C to the Fahrenheit scale.

Solution:

Step I: Multiply the number of degree by 9.

= 40° × 9

= 360°

Step II: Divide the product by 5.

= 360° ÷ 5

= 72°

Step III: Add 32 to the result.

= 72 + 32

= 104° F

Therefore, 40° C = 104° F

2. Convert 30°C to the Fahrenheit scale.

Solution:

Step I: Multiply the number of degree by 9.

= 30° × 9

= 270°

Step II: Divide the product by 5.

= 270° ÷ 5

= 54°

Step III: Add 32 to the result.

= 54 + 32

= 86° F

Therefore, 30° C = 86° F

3. Convert 75°C to the Fahrenheit scale.

Solution:

Step I: Multiply the number of degree by 9.

= 75° × 9

= 675°

Step II: Divide the product by 5.

= 675° ÷ 5

= 135°

Step III: Add 32 to the result.

= 135 + 32

= 167° F

Therefore, 75° C = 167° F

4. Convert 20°C to the Fahrenheit scale.

Solution:

Step I: Multiply the number of degree by 9.

= 20° × 9

= 180°

Step II: Divide the product by 5.

= 180° ÷ 5

= 36°

Step III: Add 32 to the result.

= 36 + 32

= 68° F

Therefore, 20° C = 68° F

5. Convert the following Celsius into Fahrenheit. 

(i) 80° C

(ii) 40° C

Solution:

(i) 80° C

We know that F = (C × $\frac{9}{5}$) + 32

F = (80 × $\frac{9}{5}$) + 32

F = ($\frac{80 × 9}{5}$) + 32

F = (16 × 9) + 32

F = 144 + 32

F = 176° F

Hence, 80° C = 176° F

(ii) 40° C

We know that F = (C × $\frac{9}{5}$) + 32

F = (40 × $\frac{9}{5}$) + 32

F = ($\frac{40 × 9}{5}$) + 32

F = (8 × 9) + 32

F = 72 + 32

F = 104° F

Hence, 40° C = 104° F.

Worksheet on Converting the Temperature from Celsius to Fahrenheit

I. Convert the following into Fahrenheit scale.

1. 70°C

2. 85°C

3. 25°C

4. 55°C

5. 95°C

6. 45°C

7. 100°C

8. 53°C

9. 90°C

10. 37°C

11. 5°C

12. 75°C

13. 30°C

14. 65°C

15. 90°C

16. 80°C

17. 20°C

18. 92°C

19. 14°C

20. 23°C

21. 10°C

22. 40°C

23. 36°C

24. 70°C

Answer:

I. 1. 158° F

2. 185° F

3. 77° F

4. 131° F

5. 203° F

6. 113° F

7. 212° F

8. 127.4° F

9. 194° F

10. 98.6° F

11. 41° F

12. 167° F

13. 86° F

14. 149° F

15. 194° F

16. 176° F

17. 68° F

18. 197.6° F

19. 57.2° F

20. 73.4° F

21. 50° F

22. 104° F

23. 96.8° F

24. 158° F

● Temperature.

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