L24 · Rationals as fractions and decimals

1. 1.

   Write 38 as a decimal.

   Answer. 0.375

   3 ÷ 8 = 0.375.

2. 2.

   Write 0.375 as a fraction in simplest form.

   Answer. 38

   0.375 = 38 = 38.

3. 3.

   Write 1.75 as a fraction in simplest form.

   Answer. 134

   1.75 = 74 = 134.

4. 4.

   Write 18 as a decimal.

   Answer. 0.125

   1 ÷ 8 = 0.125.

5. 5.

   Write 74 as a decimal. Then Malik needs 4 of that amount. What is the total they need?

   Answer. 7

   7 ÷ 4 = 1.75. Then multiply by 4: 7.

6. 6.

   Write 74 as a decimal. Then Ava needs 5 of that amount. What is the total they need?

   Answer. 8.75

   7 ÷ 4 = 1.75. Then multiply by 5: 8.75.

7. 7.

   Write 25 as a decimal. Then Sam needs 4 of that amount. What is the total they need?

   Answer. 1.6

   2 ÷ 5 = 0.4. Then multiply by 4: 1.6.

8. 8.

   Write 0.125 as a fraction in simplest form. Then Elena needs 3 of that amount. What is the total they need?

   Answer. 38

   0.125 = 18 = 18. Then multiply by 3: 38.

9. 9.

   Write 0.375 as a fraction in simplest form. Then Malik needs 4 of that amount. What is the total they need?

   Answer. 112

   0.375 = 38 = 38. Then multiply by 4: 112.

10. 10.

    Write 25 as a decimal. Then Luis needs 5 of that amount. What is the total they need?

    Answer. 2

    2 ÷ 5 = 0.4. Then multiply by 5: 2.

11. 11.

    Think

    Sam tried this problem:
    Write 74 as a decimal.
    Sam wrote 3.5. That is not correct. What is the right answer?

    Answer. 1.75

    Sam’s answer 3.5 is off. 7 ÷ 4 = 1.75.

12. 12.

    Think

    Nora tried this problem:
    Write 0.375 as a fraction in simplest form.
    Nora wrote 39. That is not correct. What is the right answer?

    Answer. 38

    Nora’s answer 39 is off. 0.375 = 38 = 38.

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