Question

If point E is between points D and F and DE = 27 and EF = 34, find DF

Answer 1

You can think of it like this:
D                                          E                                                                F
Between D and E there are 27 units, between E and F there are 34 units so 27+34 is equal to the distance between D and F.

27+34=61

Hope this helps :)