L2 · Unit rates with fractions

1. 1.

   A recipe uses 13 cup of oil for 34 cup of flour. How many cups of oil per 1 cup of flour?

   Answer. 49 cup per cup

   13 ÷ 34 = 49.

2. 2.

   A recipe uses 12 cup of oil for 1 cup of flour. How many cups of oil per 1 cup of flour?

   Answer. 12 cup per cup

   12 ÷ 1 = 12.

3. 3.

   A recipe uses 1 cup of oil for 112 cup of flour. How many cups of oil per 1 cup of flour?

   Answer. 23 cup per cup

   1 ÷ 112 = 23.

4. 4.

   A recipe uses 112 cup of oil for 23 cup of flour. How many cups of oil per 1 cup of flour?

   Answer. 214 cup per cup

   112 ÷ 23 = 214.

5. 5.

   A recipe uses 1 cup of oil for 13 cup of flour. How many cups of oil per 1 cup of flour? Then Jonah needs 3 of that amount. What is the total they need?

   Answer. 9 cup per cup

   1 ÷ 13 = 3. Then multiply by 3: 9 cup per cup.

6. 6.

   A recipe uses 1 cup of oil for 12 cup of flour. How many cups of oil per 1 cup of flour? Then Ava needs 4 of that amount. What is the total they need?

   Answer. 8 cup per cup

   1 ÷ 12 = 2. Then multiply by 4: 8 cup per cup.

7. 7.

   A recipe uses 14 cup of oil for 112 cup of flour. How many cups of oil per 1 cup of flour? Then Elena needs 5 of that amount. What is the total they need?

   Answer. 56 cup per cup

   14 ÷ 112 = 16. Then multiply by 5: 56 cup per cup.

8. 8.

   A recipe uses 112 cup of oil for 12 cup of flour. How many cups of oil per 1 cup of flour? Then Malik needs 2 of that amount. What is the total they need?

   Answer. 6 cup per cup

   112 ÷ 12 = 3. Then multiply by 2: 6 cup per cup.

9. 9.

   A recipe uses 14 cup of oil for 112 cup of flour. How many cups of oil per 1 cup of flour? Then Elena needs 2 of that amount. What is the total they need?

   Answer. 13 cup per cup

   14 ÷ 112 = 16. Then multiply by 2: 13 cup per cup.

10. 10.

    A recipe uses 12 cup of oil for 34 cup of flour. How many cups of oil per 1 cup of flour? Then Nora needs 2 of that amount. What is the total they need?

    Answer. 113 cup per cup

    12 ÷ 34 = 23. Then multiply by 2: 113 cup per cup.

11. 11.

    Think

    Priya tried this problem:
    A recipe uses 12 cup of oil for 35 cup of flour. How many cups of oil per 1 cup of flour?
    Priya wrote 57 cup per cup. That is not correct. What is the right answer?

    Answer. 56 cup per cup

    Priya’s answer 57 cup per cup is off. 12 ÷ 35 = 56.

12. 12.

    Think

    Sam tried this problem:
    A recipe uses 14 cup of oil for 35 cup of flour. How many cups of oil per 1 cup of flour?
    Sam wrote 513 cup per cup. That is not correct. What is the right answer?

    Answer. 512 cup per cup

    Sam’s answer 513 cup per cup is off. 14 ÷ 35 = 512.

Original extra practice. Keys are computed from the items, not guessed.