Final answer:
Charlie divided his cookies into 270 batches
Step-by-step explanation:
To find the number of batches Charlie divided his cookies into, we need to divide the total number of cookies by the number of cookies in each small batch. Since there are 90 cookies in total and each small batch has 1/3 cup of flour, we can set up a proportion:
- Number of batches = Total number of cookies / Number of cookies in each small batch
- Number of batches = 90 / (1/3) = 90 * 3 = 270
Therefore, Charlie divided his cookies into 270 batches.