Isn't it impossible to add and subtract unlike fractions on a number line?

Add or Subtract of unlike fraction can not be done directly on number line. First convert them into like fraction then do add or subtract on number line.

 You can view the mentioned in Study Material >> Chapter - 4 : Fractions >> Lesson - 5 : Comparing and Ordering Fractions >> Slide - 2, 3. If you still have any doubts about any specific topic then do let us