1-4: TEKS Practice

  • 1. Which of the following is a pattern in the table?

    • A. As the exponent of 10 increases, the number decreases.

    • B. As the exponent of 10 decreases, the number decreases.

    • C. The exponents that are less than 0 cause the number to become negative.

    • D. The exponents that are greater than 0 cause the number to decrease.

  • 2. Which list shows the numbers in order from least to greatest?

    • A. 3.18 × 10−3, 3.18 × 105, 3.18 × 106

    • B. 3.18 × 106, 3.18 × 105, 3.18 × 10−3

    • C. 3.18 × 10−3, 3.18 × 106, 3.18 × 105

    • D. 3.18 × 105, 3.18 × 10−3, 3.18 × 106

  • 3. Which of the following numbers is written in scientific notation?

    • A. 20 × 107

    • B. 20

    • C. 8.66

    • D. 8.66 × 107

  • 4. Is the number 4.74 × 142 in scientific notation?

    • A. No, it is not in scientific notation. The first factor is not less than 10.

    • B. No, it is not in scientific notation. The first factor is not greater than or equal to 1.

    • C. No, it is not in scientific notation. The second factor is not a power of 10.

    • D. The number is in scientific notation.

  • 5. Reasoning Is 23 × 10−6 in scientific notation?

    • A. No, it is not in scientific notation. The second factor is not a power of 10.

    • B. No, it is not in scientific notation. The number is not written as a product of 2 factors.

    • C. No, it is not in scientific notation. The first factor is not less than 10.

    • D. The number is in scientific notation.

  • 6. Error Analysis Fred's math teacher asks, “Which of the following numbers are written in scientific notation?” Fred says, “4.75 × 108 is written in scientific notation.”

    • a. What is the correct answer? Check all that apply.

      • A. 8.87 × 108

      • B. 4.75 × 108

      • C. 17

      • D. 4.75

    • b. What error did Fred make?

      • A. The number 17 is also written in scientific notation.

      • B. The number 8.87 × 108 is also written in scientific notation.

      • C. The number 4.75 × 108 is not written in scientific notation.

      • D. The number 4.75 is also written in scientific notation.

  • 7. Astronomy In a science fiction book, the distances from four planets to another planet are given in light years. Which list shows the distances in order from least to greatest?

    • A. 6.35 × 106, 6.35 × 10−2, 6.35 × 104, 6.35 × 107

    • B. 6.35 × 10−2, 6.35 × 10−7,6.35 × 104, 6.35 × 106

    • C. 6.35 × 107, 6.35 × 106,6.35 × 104, 6.35 × 10−2

    • D. 6.35 × 10−2, 6.35 × 104,6.35 × 106, 6.35 × 107


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Table of Contents

Digits, Grade 8, Volume 1, Homework Helper Unit A: Number and Operations Unit B: Proportionality Unit C: Expressions, Equations, and Relationships English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties