How to add mixed numbers and regroup them

1st Convert into a top heavy fraction or improper fraction

like for example 3 1/2 so you times the 3 by 2 which is 6 and add that one so it will be 7/2lets say your adding that to 2 1/2 you convert that which is 5/2 5/2 and 7/2 have the same denominator so you add 5 and 7=12 12/2 and 2 goes into 12 6x so it is just 6 THIS IS AN EXAMPLETO REGROUP THEM Lets say its  21/4YOU DIVIDE 21 BY 4 WHICH IS 5 WITH AN REMAINDER OF 1 SO YOU DO THAT 5 AS A BIG NUMBER AND THAT ONE GES ABOVE THE FOR LIKE 5 SO I TRIED :)