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 - Building Confidence

NameDate

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

1.
Ari draws the set ｛x | x > 3｝ on paper. Which number is a member of the set?
- 0
- 1
- 3
- 5
2.
Bo draws the set ｛x | x < 6｝ with a pencil. Which number is a member of the set?
- 4
- 9
- 8
- 6
3.
Esme draws the set ｛x | x ≥ 7｝ in a math notebook. Which number is a member of the set?
- 5
- 3
- 6
- 9
4.
Jun draws the set ｛x | x ≤ 4｝ on paper. Which number is a member of the set?
- 9
- 7
- 2
- 6
5.
Kira marks set A in red and set B in blue on one number line on paper. Which numbers are in A and in B?
- ｛1, 2, 4, 7｝
- ｛1, 3, 4, 6, 8｝
- ｛3, 6, 8｝
- ｛1, 2, 3, 4, 6, 7, 8｝
6.
Milo marks set A in red and set B in blue on one number line on paper. Which numbers are in A and in B?
- ｛0, 2, 3, 4, 5, 9｝
- ｛2, 3, 9｝
- ｛0, 2, 3, 5, 9｝
- ｛0, 4, 5｝
7.
Noah marks set A in red and set B in blue on one number line with a pencil. Which numbers are in A and in B?
- ｛1, 2, 5, 6, 8, 9｝
- ｛1, 5, 8, 9｝
- ｛1, 2, 6, 8｝
- ｛2, 6｝
Pia reads the set ｛x | x is a whole number, 2 < x < 9｝ on paper. How many members does the set have?
Ren reads the set ｛x | x is a whole number, 4 < x < 10｝ with a pencil. How many members does the set have?
Tala reads the set ｛x | x is a whole number, 3 ≤ x ≤ 8｝ in a math notebook. How many members does the set have?

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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