Mathematics Grade 7 Lesson 1 Introducing Sets

Sets

1. LESSON 1 FIRST QUARTER MATHEMATICS GRADE 7 INTRODUCING Sets

2. Objectives: MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS Define set Describe a set in descriptive form, rule form, and roster form Differentiate descriptive form, rule form, and roster form

3. Definition of Terms MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS Set – is a well–defined collection of distinct object. Well–Defined - means that you can determine exactly whether an object belongs to a set or not. Element – the objects in the set. Braces – used to denote a set separated by commas.

4. MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS Ellipsis - denotes the infinite elements of a set The symbol is ... Cardinality - definite number of elements in a set Null Set - empty set ; set that contains no element The symbol is ∅ or { } Definition of Terms

5. Ways on how to describe a set MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS - uses verbal desription od its elements Descriptive Form Examples: The set of string instruments The set of chess pieces The set of odd numbers less than 10

6. MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS List the elements of the given set. The set of major subjects

7. MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS List the elements of the given set. The set of major subjects { Filipino, English, Math, Science, A.P. }

8. MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS List the elements of the given set.

9. MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS List the elements of the given set. The set of letters in the word SIPNAYAN

10. MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS List the elements of the given set. The set of letters in the word SIPNAYAN { A, I, N, P, S, Y }

11. MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS List the elements of the given set.

12. MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS List the elements of the given set. Let W be the set of all whole numbers

13. MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS List the elements of the given set. Let W be the set of all natural numbers W = { 1, 2, 3, 4, 5, 6, 7... }

14. Ways on how to describe a set MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS - the elements are listed, enumerated, separated by commas and enclosed with braces. Roster / Tabular Form Examples: { Filipino, English, Math, Science, A.P. } { A, I, N, P, S, Y } W = { 1, 2, 3, 4, 5, 6,7... }

15. W = { 1, 2, 3, 4, 5, 6, 7 ...} elements MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS set braces Ways on how to describe a set Roster / Tabular Form

16. Ways on how to describe a set MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS indicates the properties that its members must satisfy - elements are described using { x | x ...} which is read as " set of x such that x is" Set-Builder / Rule Form

17. Ways on how to describe a set MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS { x | x is a member of Justice League } Set-Builder / Rule Form Examples: { x | x is a whole number } M = { x | x is a consonant } R = { x | x is a prime number }

18. Wrap Up MATHEMATICS GRADE 7 : FIRST QUARTER : LESSON 1 : INTRODUCING SETS What is a set?