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The problem asks how many cups of flour are needed for 3 batches of cookies, with each batch requiring \( 2 \frac{1}{2} \) cups of flour.

### Step-by-step solution:

1. Convert the mixed number \( 2 \frac{1}{2} \) into an improper fraction:
   \[
   2 \frac{1}{2} = \frac{5}{2}
   \]
2. Multiply the amount of flour for one batch by the number of batches (3):
   \[
   3 \times \frac{5}{2} = \frac{15}{2}
   \]
3. Convert \( \frac{15}{2} \) back into a mixed number:
   \[
   \frac{15}{2} = 7 \frac{1}{2}
   \]

Thus, \( 7 \frac{1}{2} \) cups of flour are needed for 3 batches.

The correct answer is **7 1/2 cups**.

Would you like more details or have any questions?

Here are 5 related questions for practice:
1. If a recipe requires \( 3 \frac{1}{4} \) cups of flour per batch, how many cups are needed for 4 batches?
2. How many cups of flour are needed for 5 batches if each batch uses \( 1 \frac{2}{3} \) cups?
3. A recipe calls for \( 4 \frac{1}{3} \) cups of sugar per batch. How much is needed for 2 batches?
4. What is the total flour needed for \( 2 \frac{2}{5} \) cups per batch over 6 batches?
5. How do you convert \( 6 \frac{3}{4} \) into an improper fraction?

**Tip:** When multiplying fractions, always convert mixed numbers to improper fractions first for easier calculation!

A recipe calls for 2 1/2 cups of flour per batch of cookies. How many cups of flour are needed for 3 batches?

Learn how to calculate the total amount of flour needed for multiple batches of cookies. The problem requires multiplying mixed numbers and converting improper fractions back into mixed numbers. Great for students in Grades 5-7.

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