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Given two sets, determine whether the two sets are equivalent and whether one set is a subset of another. Given one set, determine its power set.
Standard #: MA.912.LT.5.1
Standard Information
General Information
Subject Area: Mathematics (B.E.S.T.)
Grade: 912
Strand: Logic and Discrete Theory
Standard: Apply properties from Set Theory to solve problems.
Date Adopted or Revised: 08/20
Status: State Board Approved
Standard Instructional Guide

Connecting Benchmarks/Horizontal Alignment

 

Terms from the K-12 Glossary

 

Vertical Alignment

Previous Benchmarks

Next Benchmarks

Purpose and Instructional Strategies

In Math for College Liberal Arts, students begin to learn about sets and subsets and their equivalency. In other classes, students will explore additional information about equivalency of sets. 
  • Instruction includes an introduction to sets. A set is a collection of objects. The members of a set are called elements. Sets are represented by capital letters. 
  • Sets can be described in three ways. 
    • Word Description: W is the set of days of the week. 
    • Roster Form: elements are listed in { }. The order of the elements does not matter. W = {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday} 
    • Set Builder Notation: {x|x ________}.
      This is read “the set of all x such that x is _______.” 
      W = {x|x is a day of the week}
      The empty set, or null set, is a set with no elements and can be represented by { } or ∅. 
  • Instruction includes defining equivalent sets as sets with the same number of elements (same cardinality n(A) = n(B)). 
    • Example:
      Given set A = {a, b, c, d} and set B = {1,2,3,4} sets A and B are equivalent because both sets have four elements. 
  • Instruction includes defining a subset as a set whose elements are all elements of another set: A ⊆ B if all elements of A are also in B or there is no element in A that is not in B. 
    • Example:
      Given set A = {a, b, c} and set B = {a, b, c, d}
      A ⊆ B but B ?
      The empty set is a subset of every set – there is no element in the empty set that is not in the other set. 
  • Students will find the power set of set A, P(A) which is defined as the set of all subsets of set A. 
    • Example: 
      Given A = {a, b}
      The power set is P(A) = {{ },{a},{b},{a, b}}
    • Example: 
      Given C = {red, white, blue} 
      The power set is P(C) = {{ },{red},{white},{blue},{red, white},{red, blue},{white, blue},{red, white, blue}}

Common Misconceptions or Errors

  • Students may not include the empty set or the set itself in the power set.

Instructional Tasks

Instructional Task 1 (MTR.4.1)
  • Given the following sets: 
    A = {2,4,6, 8,10} 
    B = {1,3,5,7,9} 
    C = {6,4,8,2} 
    D = {a, b, c, d, e} 
    E = {a, b, c}
    F = {10,8,6,4,2} 
    • Part A. Identify the sets that are equivalent to set A. 
    • Part B. Identify the sets that are subsets of A. 

Instructional Task 2 (MTR.5.1) 
  • Part A. Fill in the chart below. 

  • Part B. How many subsets would you expect there to be for the set
    {red, white, blue, green}? 
  • Part C. How many subsets would you expect there to be for the set
    {Josh, Abe, Jonah, Allie, Adam, Shane}? 
  • Part D. Write an equation to represent how many subsets there are for a set of n elements.

Instructional Items

Instructional Item 1 
  • Find the power set of set A if A = {a, b, c, d}.

*The strategies, tasks and items included in the B1G-M are examples and should not be considered comprehensive.
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