I know what this means but what does it mean

15 can someone translate this paragraph to german? (i created all and the incident went so complicated so most of them might not be senseful but the only important thing is translating not harmony of the text.)

Fred wants to make brownies to make brownies he needs 2 ÷ 3cups of flour per batch of brownies if fred has 17 cups of flour then how many can fred make

What is the correct way to tell your grandfather to buy the book? question 27 options: kaufen sie das buch! kaufen du das buch! kaufst du das buch! kaufen das buch!