Number
40 000 = ____ ten thousands
4 ten thousands
What is the value of this expression when t = 4?
3t − 8
4
the whole group of people or things you want to learn about.
Population
a tool for measuring angles in degrees (º)
protractor
money you can use now by promising to pay it back later, or money refunded on one purchase to make another purchase
credit
60 000 = ____ thousands
60 thousands
What is the value of this expression when t = 4?
4t + 5 − 10
11
a small group inside a population.
sample
a closed 2-D shape with all straight sides, for example, triangle, rectangle, hexagon
polygon
money that is supposed to be paid back; for example, if you borrow $50 from a parent, then you have $50 of debt that you need to pay back
debt
31 000 = ____ hundreds
310 hundreds
Which expression increases really fast when s increases?
A 2s + 100
B 500 – s
C 2 + 20s
D 89 + s
C
the collection of data from a small group (a sample) to learn about a large group (a population)
Survey
a quadrilateral that has two pairs of parallel and equal sides
parallelogram
Tell whether the person is using credit or just getting more in debt and by how much:
Alisa bought some games at a store. She paid $59.12 using cash. Later, she returned one game that cost $22.13, but the store did not give Alisa her money back.
Credit of $22.13 for the game she returned
2020 = ____ tens
202 tens
What is the value of each expression when n = 4 and m = 5?
18 – m – n
9
the number of times a particular category of data occurs
frequency
the point where two sides of a shape meet
vertex
Tell whether the person is using credit or just getting more in debt and by how much: You asked your sister to loan you $50 to buy a new skateboard.
Debt of $50
Write this number in standard form:
3 ten thousands + 5 tens
30 050
How much more or less is this expression worth when t = 20 than when t = 10?
3(t − 2) – 5
It is 30 more when t = 20
a characteristic of a set of survey data about a sample group that might cause the data to not represent the larger group; for example, collecting data about children’s favourite books by asking only four-year-olds would probably produce biased results
bias
identical in shape and size
congruent
Tell whether the person is using credit or just getting more in debt and by how much: Terry used a credit card to buy clothes for $38.12.
Terry used credit but has a debt of $38.12