Doreen needs 5 teaspoons of salt for 5 batches of bread.
Step-by-step explanation:
To find out how much salt Doreen needs for 5 batches of bread, we need to start by finding how much salt is needed for one batch. The recipe calls for 1 teaspoon of salt for 1 batch. Since Doreen wants to bake 5 batches, we can multiply the amount of salt needed for one batch by 5:
1 teaspoon/batch × 5 batches = 5 teaspoons
Therefore, Doreen needs 5 teaspoons of salt for 5 batches of bread.