Analysis: It can be seen that the normal journey is 1.3km, the actual distance after turning back is 0.3×2+ 1.3= 1.9km, and the extra distance when not turning back is1.3 = 0.6 km.

Solution:

0.3× 2+1.3-1.3 = 0.6 km.

A: I walked 0.6 kilometers more.