Grade 9 · Math · Algebra 1

9th grade Sets: members, "and", "or", "not", and set-builder and interval notation worksheet

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Sets: members, "and", "or", "not", and set-builder and interval notation

Grade 9 Math Worksheet

NameDate

Circle the best answer, or write your answer on the line.

Esme writes A = ｛3, 5, 6, 8, 11｝ and B = ｛2, 5, 8, 11, 12｝ with a pencil. Which numbers are in A and in B, written with commas?
Jun writes A = ｛2, 4, 7, 9, 10｝ and B = ｛1, 4, 6, 9, 10, 12｝ on paper. Which numbers are in A and in B, written with commas?
Kira writes A = ｛1, 3, 6, 9｝ and B = ｛3, 4, 6, 10｝ in a math notebook. Which numbers are in A or in B (or in both), written with commas?
Luz writes A = ｛2, 5, 8, 11｝ and B = ｛5, 7, 8, 12｝ on paper. Which numbers are in A or in B (or in both), written with commas?
Milo writes A = ｛1, 4, 7, 10｝ and B = ｛2, 4, 7, 11｝ with a pencil. Which numbers are in A or in B (or in both), written with commas?
Noah writes A = ｛3, 6, 9, 12｝ and B = ｛1, 6, 9, 10｝ in a math notebook. Which numbers are in A or in B (or in both), written with commas?
Ren uses the whole numbers from 3 to 12 as set U with a pencil. Set A = ｛4, 7, 8, 11｝. Which numbers in U are not in A, written with commas?
Tala uses the whole numbers from 1 to 8 as set U in a math notebook. Set A = ｛3, 4, 6｝. Which numbers in U are not in A, written with commas?
9.
Zee draws a graph on paper. Which set matches the graph?
- ｛x | x ≥ 1｝
- ｛x | x < 1｝
- ｛x | x ≤ 1｝
- ｛x | x > 1｝
10.
Esme draws a graph on paper. Which set matches the graph?
- ｛x | x ≥ -4｝
- ｛x | x > -4｝
- ｛x | x ≤ -4｝
- ｛x | x < -4｝

9th grade Sets: members, "and", "or", "not", and set-builder and interval notation worksheet – printable — Print: 1 2 3 4 5 6

About this worksheet

Sets and set notation. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

I can list the members of a set and say whether a number is a member of { x | x > 3 }.
I can find the numbers in A and B, in A or B, and in U but not in A, on one number line.
I can match a graph to its set-builder or interval notation, and I know ( leaves an end out and [ keeps it.

Standard: S-CP.A.1 (set language); A-REI.B.3 (notation)

Words to know

set: A group of numbers, written as a list or by a rule.

member: A number that belongs to the set.

and (intersection): The numbers that are in both sets.

or (union): The numbers that are in either set, or in both.

not (complement): The numbers of the whole group U that are not in the set.

interval notation: (3, ∞) writes a stretch by its ends; ( leaves an end out, [ keeps it.

Common mistakes

Your child counted the number that sits on an open circle.

Your child left out the number that sits on a closed circle.

Your child subtracted the two end numbers instead of listing the members.

What to say

Ask: is 3 greater than 3?

Ask: does the sign say "or equal to"?

Ask: how many numbers are there from 3 to 5, counting both?

Questions parents ask

What is the most common mistake with sets: members, "and", "or", "not", and set-builder and interval notation?

Your child counted the number that sits on an open circle.

How can I help my child with sets: members, "and", "or", "not", and set-builder and interval notation?

Ask: is 3 greater than 3?

Are these 9th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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