Correct the mistakes in how the numbers are said in these sentences.

1. 3² = 9 Three square equals nine. Three squared equals nine. squared
2. 46.6% Oxygen accounts for forty-six comma six per cent of the earth’s crust.
    
3. 7 × 9 = 63 Seven nine are sixty-three.
    
4. 18^o C The temperature today is eighteen points Celsius.
    
5. 3m × 6m My bedroom is three with six metres.
    
6. 6⁹ What is six at the power of nine?
    
7. 11/16 Eleven sixteens of the students passed the exam.
    
8. 2/3 × 5³ = 831/3 Two third times five cubed is eighty-three and a third.