can you help me with one question. I don't get this one at all.
it says a charity bike ride has three stages.

stage 1 - machester to leeds
stage 2 - leeds to carlisle
stage 3 = carlisle to edinburgh

the distance in km, between the cities are shown below

machester
64 leeds
160 148 carlisle
279 260 119 edinburgh

calculate the total distance of the bike ride

do I just total everything up?

Just add the distances from Mahester to Leeds, Leeds to Carlisle, and Carlisle to Edinburgh together to get the total distance.