Ratios & Proportions
what is a ratio?
A comparison of two quantities by division.
What is the opposite of –4?
4
Write an expression for “7 more than twice a number.”
2x + 7
What is the area of a rectangle with length 8 and width 3?
24 square units
What is the mean of: 5, 10, 15?
10
Write a ratio for 5 red balls to 3 blue balls.
5:3 or 5 to 3
Order these from least to greatest: –3, 0, 5, –7
–7, –3, 0, 5
Solve: 3x = 18
x = 6
What is the volume of a rectangular prism with l = 4, w = 3, h = 5?
60 cubic units
What is the median of: 3, 7, 9, 11, 13?
9
A recipe calls for 2 cups of flour for every 3 cups of sugar. How much flour is needed for 9 cups of sugar?
6 cups of flour
What is the absolute value of –8?
8
What is the difference between an expression and an equation?
An expression has no equal sign; an equation does.
Find the area of a triangle with base 10 and height 6.
30 square units
What is the mode of: 4, 6, 4, 8, 9?
What is a unit rate? Give an example.
A rate with a denominator of 1 (e.g., $2 per pound)
Solve: –6 + (–3)
–9
Simplify: 4(x + 2)
4x + 8
A net of a 3D figure is made of 6 squares. What shape is it?
Cube
What is the range of: 12, 5, 8, 15?
10
If a car travels 180 miles in 3 hours, what is its speed?
60 miles per hour
2/3 ÷ 1/6
4
What value of x makes this equation true? 2x – 5 = 9
x = 7
What formula is used to find the volume of a rectangular prism?
V = l × w × h
What kind of question is statistical?
One that anticipates variability and needs data to answer (e.g., “How many hours do 6th graders sleep?”)