# Week 3 – Lesson 1

Grade: 5

Date: September 28, 2020

Subject: Mathematics

Topic: Equal and Equivalent Sets

**Focus Question: **In what ways can sets be represented?

**Equal Sets**

Two sets are equal if the members in one set are

identical to the members in the other set.

The number of members in both sets must also be equal.

Example:

M = {♧,◇,♡,♤} N = {♧,◇,♡,♤}

Therefore M =N

n(M) = n(N) = 4

* Remember*:

**When listing members of a set, order is not important.****Equivalent Sets**

Two sets are equivalent if the number of members

in one set is equal to the number of members in the other set.

The members do not have to be identical.

The symbol for equivalent is

Example:

A = {cat, dog, rabbit} B = {man, woman, child}

n(A) = n(B) = B

Therefore A B

*:*

**Remember**

**Equal sets are equivalent but equivalent sets**

**are not necessarily equal.**