The bakery used two types of flour: 1/5 of a bag of wheat flour and 4/5 of a bag of white flour.

To find the total amount of flour used, we simply add the two fractions together:

$\frac{1}{5} + \frac{4}{5} = \frac{1+4}{5} = \frac{5}{5} = 1$

So, the bakery used 1 bag of flour in total.

Do you want details or have any questions?

Here are 5 related questions you can explore:

1. If the bakery had used 2/5 of a bag of wheat flour instead, how much total flour would they have used?
2. What if the bakery used 3/4 of a bag of white flour and 1/4 of a bag of wheat flour?
3. How much flour would they need to double this recipe?
4. If the bakery had 5 bags of flour in stock, how many are left after this use?
5. What is the sum of 1/5, 2/5, and 4/5 in terms of flour?

Tip: When adding fractions, make sure the denominators are the same before combining them.