Vocabulary & Concepts
Rational Number Operations
Probability & Simulations
Proportionally
Real-World Rational Numbers
100
When you multiply or divide two negative rational numbers, the result is always this.
What is positive?
100
Simplify the following fraction
(-12)/-20
What is
+3/5
100
What is the Probability of pulling a vowel out of a bag containing every letter in the alphabet?
What is
5/26
100
What is the constant of proportionality?
8
100
A bottle holds 1/2 liter of water. If you drink 1/4 liter, this is the amount of water left in the bottle.
What is 1/4 liter?
200
A number that can be expressed as a fraction, including integers, decimals, and fractions, is called this.
What is a rational number?
200
Divide: -12 ÷ (-3)
What is 4?
200
Henrietta wants to simulate a $1/3$ probability of her team winning. If she uses a standard number cube, which numbers should represent a "win"?
Any Two numbers on the dice... EX:number divisible by 3 or 1 and 2
200
If 4 notebooks cost $8.40, this is the cost of 1 notebook, assuming the cost is proportional.
What is $2.10?
200
A scuba diver is at an elevation of 18 feet below sea level. After 8 seconds, she is at 20 feet below sea level. What is her rate of change in elevation per second?
What is -¼ feet per second (or -0.25 feet per second)?
300
What do you call the set of all possible outcomes?
What is the Sample Space?
300
-¾ × 7
What is -5¼ (or -5.25)?
300
A random sample of 1,000 customers showed that 70 people had no phone preference. If a smaller random sample of 100 students was taken from the same population, how many students would you expect to have no phone preference?
What is 7 Students?
300
In a table, if x = 1 and y = 12, what must the value of y be when x = 0.5 for the relationship to be proportional?
y = 6 (The constant of proportionality is 12)
300
The shore at a beach changes by -2/3 foot each year. What is the total change after 7 years?
What is
-4 2/3
400
What is the "formula" for probability?
400
Calculate: (-2.5) × (-4) ÷ 2
What is 5?
400
A school bookstore surveyed 10 students and found that 4 prefer metal pens and 6 prefer plastic pens. If 120 students visited the bookstore that day, how many would you expect to prefer metal pens?
What is 48 Students?
400
Is this proportional?
What is NO?
400
Over a 7-hour period, the outside temperature changed by an average of -3.5 degrees per hour. What was the total temperature change during this period?
What is -24.5 degrees Fahrenheit (or a decrease of 24.5 degrees)?
500
Find the average of these numbers:
–1, –1, –1, –0.5, –0.25
What is true about the sum of the numbers ?
-0.75 .... What is the sum is negative?
500
Find two integers whose product is -12 and whose sum is -1.
What is 3 and -4?
500
A spinner has 6 equal sections numbered 1–6. Explain why landing on a 7 is "impossible" while landing on a 6 is "unlikely."
7 is not on the spinner; 6 is on the spinner but only represents
1/6
of the area.
500
How do you find the Constant of proportionality in a Table?
divide any y-value (output) by its corresponding x-value (input)
500
A scuba diver descends at a rate of -¼ foot per second. If she needs to reach a depth of 50 feet below sea level and she is currently at 20 feet below sea level, how many more seconds will it take her to reach her goal?
What is 120 seconds?