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    This module and collection are included inLens: Siyavula: Mathematics (Gr. 4-6)
    By: Siyavula

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To describe and illustrate number systems that differ from our own

Module by: Siyavula Uploaders. E-mail the author

MATHEMATICS

Subtraction

EDUCATOR SECTION

Memorandum

1. Before Christ

2. 5 502 / (will be +1 each year)

3.

3.1 900 000

3.2 9 000

3.3 999 900

3.4 0 990

3.5 990 000

LEANER SECTION

Content

Activity: To describe and illustrate number systems that differ from our own [LO 1.2]

Did you know?

The Egyptians used pictograms to represent numbers as long ago as

3500 B.C. Pictograms looked like these:

Figure 1
Figure 1 (bc-01.png)

1. What does B.C. mean?

_____________________________________________________________________

2. How many years ago was this?

_____________________________________________________________________

3. Calculate the following. Use contemporary digits for your answers.

Figure 2
Figure 2 (graphics1.png)

3.1 ____________________

Figure 3
Figure 3 (graphics2.png)

3.2 = .____________________

Figure 4
Figure 4 (graphics3.png)

3.3 = ____________________

Figure 5
Figure 5 (graphics4.png)

3.4 = ____________________

Figure 6
Figure 6 (graphics5.png)

3.5 = ____________________

TIME FOR SELF-ASSESSMENT

Let’s see how well you are managing. Read the criteria and place a tick in the appropriate block:

Table 1
  1 2 3 4
I know what the answer to a subtraction sum is called. _______ _______ _______ _______
I can calculate differences by rounding off to the nearest 10 and 100 (LO 1.8) _______ _______ _______ _______
I know what a prime number is (LO 1.3) _______ _______ _______ _______
I know what an even number is (LO 1.3) _______ _______ _______ _______
I understand the Egyptian pictograms and can use them to subtract (LO 1.2) _______ _______ _______ _______

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 1.2: We know this when the learner describes and illustrates written number systems different to own.

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Definition of a lens

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A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

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