STAAR Countdown: Series 8/Page 7 (CLASSWORK)

1) Which expressions have a value of - 15? Select TWO correct answers.

Answer explanation

-7 + -8 = -15 (Add the negative values. Keep the negative sign.)

12 + (-27) = -15 (In addition, when signs are difference, subtract the numbers and keep the sign of the greater absolute value. In this problem, the - 27 is further from zero. So, we keep the sign of the greater absolute value.

Tags

TEKS.6.3.D

2) The stem and leaf plot shows the grades that the students in Mr. Wu's math class earned on a test this morning. Which statement is best supported by the data in the plot?

• A. More students earned a grade of 69% than earned a grade of 80%.

• B. One fourth of the students earned a grade of 78% or less.

• C. The most common grade was 95%.

• D. Exactly one half of the students earned a grade of 80% to 95%.

Answer explanation

The stem and leaf plot indicates that half of the grades fall between 80% and 95%, confirming that exactly one half of the students earned grades in this range, which supports choice D.

Tags

TEKS.6.13.A

3) Mr. Perez owns a small truck and a large truck. His small truck can hold 0.85 tons of cargo. His large truck can hold 3 times as much cargo as his small truck. Based on this information, which statement is true?

• F. The large truck can carry 2.55 tons of cargo, because 0.85 × 3 = 2.55

• G. The large truck can carry 0.385 tons of cargo, because 0.85 + 3 = 0.385

• H. The large truck can carry 2.45 tons of cargo, because 0.85 × 3 = 2.45

• J. The large truck can carry 3.85 tons of cargo, because 0.85 + 3 = 3.85

Answer explanation

The large truck can hold 3 times the cargo of the small truck. Since the small truck holds 0.85 tons, the large truck can carry 0.85 × 3 = 2.55 tons. Therefore, choice F is correct.

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TEKS.6.3.E

• A. Kiran split x pennies into 7 groups, and there were fewer than 4 pennies in

  each group.

• B. Kiran fed a total of x ounces of food to 7 cats, and each cat ate no less than 4

  ounces of food.

• C. Kiran divided x apples into 7 sacks, and there were at most 4 apples in each sack.

• D. Kiran watched x hours of a television miniseries in 7 days, and each day he

  watched more than 4 hours of the miniseries.

Tags

TEKS.6.9.C

• Quadrant I

• Quadrant III

Answer explanation

Point A (1.2, 2.7) is in Quadrant I because both coordinates are positive. Quadrant I is where x and y values are both greater than zero.

Tags

TEKS.6.11

• Quadrant IV
• Quadrant II

Answer explanation

Point A (1.2, 2.7) is in Quadrant I (positive x, positive y), while point B (2.3, -4.4) is in Quadrant IV (positive x, negative y). Therefore, Diego plotted point B in Quadrant IV.

Tags

TEKS.6.11