### What's Wrong? Q9(d)

1. Careless!
1. Not suppose to cancel it is subtraction. Only multiplication den can.
2. Same for RHS
3. 1 +1 = 2 LOL.

Owen here.

2. We cannot cancel out the numerator and denominator when the fractions are not multiplied by each other.

3. The person directly multiple all the fractions together and the person did not use the foil or prove method. For the second step in their question,the person simplified (5-5)before multiplying first.

4. When you add fractions, you cannot simplify it by dividing the numerator of one of them and the denominator of other(for example) by the same number. This only works when you are multiplying or dividing between fractions.
Even if you were correct in the first step, the second one is wrong as
(5-5) x (1+1) = 0*2
= 0

5. canceling is only allowed when the fractions are multiplied, but not for addition and subtraction

6. As it is not multiplication, you cannot cancel out the common factors in the numerators and denominators.

7. We can only cancel the numerators and denominators during multiplication LOL.
And isn't this question similar to the one we did in the expansion worksheet? =w=

8. Not supposed to simplify before completing the entire equation.

9. Should not cross out the numbers as it is subtraction not multiplication .

10. Cancelling is only for muliplication

11. It is not multiplication or divide thus one cannot use cancellation.

12. Cannot use cancellation in this situation