Lesson 44: Simplifying Decimal Numbers — Practice Questions

1. 1. Four science students measured the mass of a rock. Their measurements were 12.5 g, 12.45 g, 12.502 g, and 12.05 g. Which measurement is the greatest?

   • A. 12.5 g
   • B. 12.45 g
   • C. 12.502 g
   • D. 12.05 g

2. 2. Arrange the following decimals in order from least to greatest: $0.9, 0.09, 0.99$. The correct order is ___.

3. 3. Which of the following statements comparing the numbers $0.7$ and $0.65$ is true?

   • A. $0.7 < 0.65$
   • B. $0.7 > 0.65$
   • C. $0.7 = 0.65$
   • D. Cannot be determined

4. 4. A list of numbers is $5.3, 5.03, 5.33, 5.303$. When these numbers are arranged from fastest to slowest (least to greatest), what is the third number in the sequence? ___

5. 5. A list of numbers is $2.8, 2.75, 2.81, 2.08$. When these numbers are arranged from least to greatest, what is the third number in the sequence? ___

6. 6. Simplify the decimal number $9.850$ by removing any unnecessary trailing zeros. The simplified form is ___.

7. 7. What is the simplest form of the number $15.020$ after removing any unnecessary zeros?

   • A. $15.2$
   • B. $15.02$
   • C. $152$
   • D. $1.502$

8. 8. Which of the following numbers has the same value as the decimal $7.4$?

   • A. $7.04$
   • B. $7.400$
   • C. $70.4$
   • D. $7.004$

9. 9. A scientist records a weight as $0.0900$ grams. Write this measurement in its simplest form: ___.

10. 10. Which statement correctly explains why $5.08$ cannot be simplified to $5.8$?

    • A. The zero is a trailing zero.
    • B. The zero is a placeholder.
    • C. Zeros can never be removed from decimals.
    • D. Only zeros before the decimal can be removed.