1.14 To recognise and represent numbers in order to describe and

Mathematics

Number concept

Educator section

Memorandum

2.1 Prime numbers: 11; 13; 17; 19

2.2 Even numbers: 8; 10; 12; 14

2.3 Multiples of 6: : 6; 12; 18; 24; 30; 36

2.4 Counting numbers 0; 1; 2; 3; 4; 5; 6

2.5 Factors of 24: 1; 2; 3; 4; 6; 8; 12; 24

3.1 * 44

3.2 12

3.3 10

3.4 5

Leaner section

Content

Activity: to recognise and represent numbers in order to describe and compare them [lo 1.3.6, lo 1.3.7]

1. At the beginning of Grade 5 (Module 1) we looked thoroughly at multiples, factors and prime numbers. Do you remember what each of these is? Let us revise!

Explain the difference between a multiple, a factor and a prime number to a friend:

Note!

Multiples of 5 = 5 ; 10 ; 15 ; 20 ; etc.

We count in fives

Factors can be divided exactly into a number.

The factors of 12 = 1 ; 2 ; 3 ; 4 ; 6 ; 12

A prime number has only two different factors,

e.g. The factors of 2: 2 and 1

The factors of 3: 3 and 1

The factors of 5: 5 and 1

Do you remember?

You can use the constant function of your pocket calculator to calculate the multiples of a number. E.g. for the multiples of 4, key in:

4 + + = = = = = =

• Use your pocket calculator to determine the multiples of 13, 15 and 24.

2. Draw lines to show which descriptions in column A match with numbers in column B:

3. Work with a friend to solve the following puzzle:

What number am i?

3.1

3.2

3.4

Assessment

Learning Outcome 1: The learner will be able to recognise, describe and represent numbers and their relationships, and to count, estimate, calculate and check with competence and confidence in solving problems.

Assessment Standard 1.3: We know this when the learner recognises and represents the following numbers in order to describe and compare them:

1.3.6: multiples and factors of at least any 2-digit and 3-digit whole number;

1.3.7: prime numbers to at least 100.