Rational Number Operations
Evaluate: −3.4 + 5.2
1.8
What is the opposite of −8.5?
8.5
Evaluate: 3/5 × 10
6
Use the distributive property: 4(x + 2)
4x + 8
An item costs $50 before 7% sales tax. What is the total cost?
$53.50
Evaluate: −3.45 + 4.23 − 7.55
−6.77
What is the sum of −13 and its additive inverse?
0
Evaluate: 3/5 ÷ 1/4
12/5 (2 2/5)
Write an equivalent expression: −(x − 5)
−x + 5
The temperature in Fairbanks is −18°F. Honolulu is 83 degrees warmer. What is Honolulu's temperature?
65°F
Evaluate: 7.8 − (−2.6)
10.4
Start at −4 on a number line and move 7 units right. Where do you land?
3
A runner runs 1 1/4 miles per hour for 6 hours. How far does the runner travel?
7 1/2 miles
Simplify: 3x − 2x + 7 − 4
x + 3
High tide is 2.4 feet and low tide is −1.7 feet. What is the difference in their heights?
4.1 feet
Evaluate: −5/6 + 1/4
−7/12
What is the distance between −6.5 and 2.5 on a number line?
9 Units
A 3/4-yard ribbon is cut into pieces that are each 1/8 yard long. How many pieces can be cut?
6 pieces
Simplify: (3x − 2) − (x + 4)
2x − 6
A store charges $144.08 for 5 buckets at $2.89 each, 10 brushes at $7.91 each, 48 towels at $0.36 each, and one case of air fresheners. What is the cost of the case?
DOUBLE JEAPARDY!!!!!!!
$33.25
Evaluate: (−2.4)(−1.5) − 5.2
−1.6
Let p = −3/4 and q = 1/2. Find p + q and explain the direction of movement on a number line.
−1/4; move right 1/2 from −3/4 to reach −1/4.
A recipe uses 2 1/3 cups of flour per batch. You have 7/9 cup of flour. What fraction of a batch can you make?
3/7 of a batch
Simplify: (2x − 3) − (−x + 5) + 2x
5x − 8
The mean of four low-tide measurements is −0.27 foot. Three measurements are −0.8, −0.2, and −0.1 foot. Find the fourth measurement.
0.02 foot