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    By: Siyavula

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To recognise the place values of digits

Module by: Siyavula Uploaders. E-mail the author

MATHEMATICS

Common and Decimal Fractions

Common Fractions

EDUCATOR SECTION

Memorandum

INTRODUCTION

The learning programme for grade six consists of five modules:

1. Number concept, Addition and Subtraction

2. Multiplication and Division

3. Fractions and Decimal fractions

4. Measurement and Time

5. Geometry; Data handling and Probability

  • It is important that educators complete the modules in the above sequence, as the learners will require the knowledge and skills acquired through a previous module to be able to do the work in any subsequent module.

COMMON AND DECIMAL FRACTIONS (LO 1; 2 AND 5)

LEARNING UNIT 1 FOCUSES ON COMMON FRACTIONS

  • This module continues the work dealt with in grade 5. Addition and subtraction of fractions are extended and calculation of a fraction of a particular amount is revised.
  • Check whether the learners know the correct terminology and are able to use the correct strategies for doing the above correctly.
  • Critical outcome 5 (Communicating effectively by using visual, symbolic and /or language skills in a variety of ways) is addressed.
  • It should be possible to work through the module in 3 weeks.
  • ** Activity 17 is designed as a portfolio task. It is a very simple task, but learners should do it neatly and accurately. They must be informed in advance of how the educator will be assessing the work.
  • LEARNING UNIT 2 FOCUSES ON DECIMAL FRACTIONS
  • This module extends the work that was done in grade 5. Learners should be able to do rounding of decimal fractions to the nearest tenth, hundredth and thousandth. Emphasise the use of the correct method (vertical) for addition and subtraction. Also spend sufficient time on the multiplication and division of decimal fractions.
  • As learners usually have difficulty with the latter, you could allow 3 to 4 weeks for this section of the work.
  • ** Activity 19 is a task for the portfolio. The assignment is fairly simple, but learners should complete it neatly and accurately. They must be informed in advance of how the educator will be assessing the work.

HOW WELL DO YOU REMEMBER THIS?

  • decimals
  • comma
  • tenths
  • second
  • thousand
  • point

1. 300

2. 710710 size 12{ { { size 8{7} } over { size 8{"10"} } } } {}

3. 9100091000 size 12{ { { size 8{9} } over { size 8{"1000"} } } } {}

4. 51005100 size 12{ { { size 8{5} } over { size 8{"100"} } } } {}

LEANER SECTION

Content

HOW WELL DO YOU REMEMBER THIS?

You have already come into contact with decimal fractions in Grades 4 and 5. Let’s see how much you remember!

Find the answers in the grid and circle them neatly:

  • 0,89 is referred to as a fraction.
  • The decimal separates whole numbers.
  • The first figure/digit following the comma represents .
  • The figure/digit after the comma represents hundredths.
  • The third figure/digit after the comma represents…………………………….ths.
  • On a pocket calculator, the decimal comma is shown by means of a .
Table 1
C B T Y W K O P T
O D E C I M A L P
M D N S I M A L E
M G T F Y M O E E
A T H L J A K L D
R Y S E C O N D E
T U T J P U N T J
V O B L P O I N T
T H O U S A N D A
W Y S H O E D G F

LET'S DO REVISION!

ACTIVITY: To recognise the place values of digits [LO 1.4.2]

It is important to know the value of each digit in a decimal number to be able to perform calculations correctly when working with decimal fractions. Let's see whether you are able to do these correctly, describing the value of the underlined digits.

1. 326,43

2. 48,796

  1. 86,549

4. 296,85

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 1.4: We know this when the learner recognises the place value of digits in:

1.4.2 decimal fractions to at least 2 decimal places.

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