Mathematics
Number concept, addition and subtraction
Subtraction
Educator section
Memorandum
Own opinion
TEST 3 TOTAL: 20
1. (a) Difference
- Addition
- Minuend
2. (a) 105; 70;
(b) 480; 360;
4. 46 – 000 – 23 000 = 23 000
5. 1 450
6. 23 600 + 400 = 24 000
24 000 + 32 123 = 56 123
32 123 + 400 + 31 = 32 554
7.
8. R500 000 – R13 401
R486 599
Leaner section
Content
Activity: to solve problems in context [lo 1.6]
CHALLENGE
Here is an assignment for your portfolio. Your educator will go through it with you and explain exactly what is expected of you. Make sure that you understand completely before you begin. Remember to work neatly!
- A challenge!
You have won a competition and are richer by a million rand! But you may only buy articles advertised in your local newspaper. Cut out the pictures/advertisements of what you would buy and paste them below, together with the prices. Indicate how much money you will have left after making your purchases. Ask a friend to check your calculations.
ASSESSMENT: ACTIVITY 3.11
| 1 | 2 | 3 | 4 | |
| Neatness and organisation | Work is untidy and un organised | Organised, but hardly legible | Neat and organised, easily legible | Neat, well organised and easily legible |
| Logical reasoning | Hardly any proof of logic | A little logic present | Uses effective Mathematical reasoning | Uses refined logic and reasoning |
| Correctness of calculations | Answers wrong (items omitted) | A few errors committed | Sufficient understanding, but subtraction errors committed | Answer is correct |
Test
SEE HOW WELL YOU CAN COPE!
1. Write down the correct answer:
1.1 The answer of a subtraction sum is known as the _______________________
1.2 The inverse of subtraction _______________________
1.3 In the sum 5 676 – 231 = 5 445, the 5 676 is known as the ______________(3)
2. Complete the following number patterns:
2.1 175 ; 140 ; 105; _______________________; 35
2.2 _______________________; _______________________; 240 ; 120 (2)
3. Complete the following flow diagram:
(2)
4. Calculate the difference, first rounding off to the nearest 1 000:
4.1 45 679 – 23 499
__________________________________________________________________ (3)
5. Complete:
6 775 – 1 448 = 6 777 - ______________________________________________ (1)
6. Seko had to calculate the following: 56 123 – 23 569. He started off by
23 569 + 31 = 23 600
- Complete the sum.
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_______________________________________________________________ (3)
7. Nomsa forgot to complete her sum. Please do it for her:
(4)
8. Mr Muruvan had R500 000. After he had paid in cash for a house, he had R13 401 left over. What was the price of his house?
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_______________________________________________________________ (4)
TOTAL: 20
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 1.6: We know this when the learner solves problems in context including contexts that may be used to build awareness of other Learning Areas, as well as human rights, social, economic and environmental issues such as:
1.6.1 financial (including buying and selling, profit and loss, and simple budgets);