Definitions
What is this symbol called π?
What is its value?
Pi
3.14
How many ways can you write a ratio?
Name them.
3
As a fraction, with a colon, with the word "to"
100% of 0
0
1 ÷ 1
1
How do you find the unit rate? (the cost of a single item)
by dividing the amount by the quantity
Define Quantity
Anything you can count
The ratio of tomatoes to red apples is 2:5.
If there's 26 tomatoes, how many red apples are there?
65 apples
50% of 250
125
150 ÷ 10
150
A car travels 350 miles in 5 hours. How many miles does the car travel in 1 hour?
70 miles
Define Ratio
The comparison of 2 quantities
For every 4 clarinets there are 6 flutes; how many would it be to triple the amount?
12 clarinets : 18 flutes
What percent of 1 hour is 15 minutes?
25%
836 ÷ 4
209
Ashlyn makes $45 in 3 hours; how much will she make in 8 hours?
$120
Define surface area
The total area of the surface of a 3D object
There are 90 girls and 85 boys in 7th grade and 85 girls and 70 boys in 6th grade.
What's the ratio for girls to the total number of students?
175 girls to 330 students
The original price of a toy was $15. If the price is reduced by 20%, what's the new cost of the toy?
$12
8361 ÷ 3
2787
A skydiver falls 144 feet in 3 seconds. how many feet do they fall per second?
48 feet/sec
Define Percentage
A number or ratio expressed as a fraction of 100.
There are 600 pupils in a school. The ratio of boys to girls in the school is 3:5. How many girls and how many boys are in the school?
375 girls to 225 boys
Melia bought a car for $5,000 and sold it for $5,500. What is the percentage of her profit?
10%
94822 ÷ 7
13546
Nolan types 350 words in 5 minutes, Jasmine types 180 words in 3 minutes, and Ty types 70 words in 1 minute.
Who types faster?
Nolan & Ty -- they both type 70 wpm