How to do this question plz

So to start with you will have to look at the 06 58 train from Swindon. So on the first colom you would move right 4 times. Than you would go down to london. So, the 06 58 train would reach london at 08 02 so you have to workout the time difference which would be 1 hour and 4 min

Hope it made sense

:)

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled