Answer:
Step- for example, 27/6. The fraction bar means you need to divide 27 by 6.
Divide 27 by 6. The answer is 4, with a remainder of 3. Use the answer as the whole number part of the mixed number, and place the remainder over the original denominator: 4 3/6.
Oliver is incorrect because if he were correct he would learn for 2 hours and 15 minutes because, 45 minutes * 3= 2:15 minutes.
10-11= -1 You could also input this number on a calculator
3(b+6) = 3*b + 3*6 = 3b + 18
