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# FP2 maths question watch

1. I don't understand part b in this question at all, usually in the method of differences questions there's only 2 columns of fractions to deal with, in this one there's 3, I'm not sure what is cancelling with what.
2. (Original post by Jabberjay_)
I don't understand part b in this question at all, usually in the method of differences questions there's only 2 columns of fractions to deal with, in this one there's 3, I'm not sure what is cancelling with what.
Sum along the diagonals.

Example

3. (Original post by Zacken)
Sum along the diagonals.

Example

Ahhh I see it now, what about the 1/6 though? I'm assuming since it isn't including in the following working out that it also cancels?
4. (Original post by Jabberjay_)
Ahhh I see it now, what about the 1/6 though? I'm assuming since it isn't including in the following working out that it also cancels?
Yes, it cancels with the diagonals that you've hidden in the "..." section.

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