There are 24 pictures on a roll film. Adelle had 84 pictures from her trip home she said that 12 other pictures were spoiled. How many rolls of film did Adelle use?
Adelle took 84+12, or 96 pictures in all, including the unspoiled ones too. And since there are 24 pictures in each roll, you divide 96 by 24. 96/24 gives you 4. So Adelle used 4 rolls of film. Hope this helps.
