Digits, Grade 7, Volume 1, Homework Helper

1-4: TEKS Practice

  • 1. Is the product − 8 · (− 3) positive or negative?

  • 2. Is the product (− 0.39)(− 0.06)(0.29) positive or negative?

  • 3. Find the product negative , 5 sixths , middle dot , 1 eighth , .

  • 4. Multiply negative 2 , and 1 half , middle dot negative 1 , and 2 thirds , .

  • 5. Multiply negative 7 , and 1 half , middle dot 2 , and 3 fourths , .

  • 6. Multiply (− 0.6)(− 0.62).

  • 7. Multiply (− 2.271)(16.47).

  • 8. A farmer has 140 bushels of wheat to sell at his roadside stand. He sells an average of 15 , and 3 fifths bushels each day. Represent the total change in the number of bushels he has for sale after 6 days.

  • 9.

    • a. Writing What is the sign of a 2 b when = 5 and = 8?

    • b. Does the sign of the product depend on the sign of a, the sign of b, or the signs of both a and b? Explain.

  • 10. Think About the Process

    • a. What is the first step in finding the product negative 4 , and 7 eighths , middle dot . open . negative 2 , and 1 half . close . question mark

      • A. Multiply the integers.

      • B. Find the sign of the product.

      • C. Multiply the fractions.

      • D. Change the sign of the second factor.

    • b. Find the product negative 4 , and 7 eighths , middle dot . open . negative 2 , and 1 half . close . .

  • 11. Reasoning What is the sign of the product open negative 2 close . open , 1 sixth , close . open negative 7 close question mark Explain your reasoning.

  • 12. Error Analysis Kyle incorrectly says that the product negative . open , negative , 6 sevenths , close . . . open , negative , 1 eleventh , close is 6 seventy sevenths , .

    • a. What is the correct product?

    • b. What was Kyle's likely error?

      • A. He found the product of two negative numbers and ignored the first negative sign.

      • B. He multiplied the numerator and denominator wrong.

      • C. He multiplied the numerators wrong.

      • D. He multiplied the denominators wrong.

  • 13. Temperature Suppose there is a 1.1 °F drop in temperature for every thousand feet that an airplane climbs into the sky. If the temperature on the ground is 59.7 °F, what will be the temperature when the plane reaches an altitude of 11,000 ft?

  • 14.

    • a. Estimation Estimate the product (14.93)(− 12.66) by rounding each factor to the nearest integer and multiplying.

    • b. Find the exact product.

  • 15. Multiply negative , 6 elevenths , . . open , negative , 1 thirteenth , close . .

  • 16. A container holds 80,000 ounces of water. There is a small leak in the container. Every 96 minutes, 1.9 ounces of water leak out. Represent the total change in the amount of water in the container after 8 hours.

  • 17. Think About the Process A ticket to see your favorite baseball team costs $49.64. That price decreases by $0.41 for every game lost during the regular season.

    • a. Which equation would be used to find the cost C of a ticket after L losses?

      • A. C = 49.64 − 0.41L

      • B. C = 49.64 + 0.41L

      • C. c equals . fraction 49.64 , over 0.41 l end fraction

      • D. C = 49.64(0.41L)

    • b. Represent the total change in the cost of a ticket after the team loses 31 games.

    • c. What is the price of a ticket after the team loses 31 games?


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Table of Contents

Digits, Grade 7, Volume 1, Homework Helper Unit A: Number and Operations Unit B: Expressions, Equations, and Relationships Unit C: Measurement and Geometry Unit D: Proportionality English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties