MATHEMATICAL LITERACY GRADE 10 Assignment 1 MEMO

MATHEMATICAL LITERACY

GRADE 10

Assignment 1

MEMO

2020

SCHOOL BASED ASSESSMENT TASK

TOPIC: Basic Skills

MARKS: 50

WEIGHTED MARK: 10

SYMBOL

M

MA

MCA

CA

A

C

S

RT/RG

SF

O

P

R

NPR

AO

EXPLANATION

Method

Method with accuracy

Method with consistent accuracy

Consistent accuracy

Accuracy

Conversion

Simplification

Reading from a table/graph/diagram

Correct substitution in a formula

Opinion/Example/Definition/Explanation

Penalty, e.g. for no units/incorrect rounding off, etc.

Rounding off

No penalty rounding or omitting units

Answer only, if correct, full marks

QUESTION 1 SOLUTION

1.1

A fee that is charged for using a particular service. ???

1.2

R42,42 x 115%???

= R48,78?

Mark

2O

(2)

1 Correct %

1 M%

1 CA

OR

VAT R42,42 x 15

100 ?

= R6,36 ?

1.3

1.4

Inclusive : R42,42 + R6,36

= R48,78 ?

40 to 50 ??

6 x R8,28 ? = R49,68 ??

4 x R8,79 ? = R35,16

5 x R15,00? = R45,00

5 x R21, 83 ?= R96,05

7,4 x R29,98? = R221,85

(3)

2RT

(2)

1 MA rate

1 CA answer

1M

1M

1M

1M

Total amount =R49,68 + R 35,16 + R45,00 + 6,05+R221,85? 1M adding

=R447,74 ?

1CA

(8)

1.5

1.6

Accept one of the following applicable reasons

? Close taps while brushing teeth/washing hands

? Rather take a shower than bath

? Fix leakages

? Do not fill the swimming pool

? Use grey water(bath or washing machine) in the

garden

Or to flush the toilet

? Reduce the capacity of the flush tank

? Use buckets to wash the car

? Install a tank

2:4

?

therefore 6 parts ?

Tumi¡¯s family :4 ?x R628,46

6

= R418,97 ?

2 O

(2)

1 A ratio

1 A total parts

1M

1 CA

(4)

1.7

Total hours

5h20 + 2h15 = 7h35 ?

= 8 hours ?

1 CA

1R

8 hrs x R159,90??

= R1279,20 ?

1M

1 CA

(4)

QUESTION 2

2.1

A = R3 108 ??

B = R55,40 ??

C = R4 504,20 ??

2A

2A

2A

(6)

2.2

Rental ?? Or Wages ??

2 RT

2.3

Total expense = R165,80+R256,10+R356,20+R521,80

=R1 299,90 ?

Working days = 4 ¡Á 6 = 24?

total expense

Average expense/day =

24

R1299,90

=

?

24

= R54,16 ?

A1:correct total for telephone

Cost

C1: converting 4 weeks to

working days

(2)

2.4

R6828,20 ¨C R4710,40 ?

= R 2117,80 ?

2.5

521,80 ?x 100 ?

6828,20

=7,64% ?

Income = profit + expense ?

= R5 486 + R4 560 ??

= R10 046 ?

income ? expenses

Profit margin =

¡Á 100%

expenses

?

?

R10046 ? R5486

=

¡Á 100%

R5486

= 83,1206....% ?

¡Ö 83,12% ?

OR

R 4560

¡Á 100% ??

R5486

= 83,1206.. ?..%

¡Ö 83,12% ?

2.6

2.7

M1: dividing telephone cost

by period

CA1: follow up answer correct

(4)

1 A correct values

1 MA

(2)

1 A correct valves

1 M % calculation

1 CA 2 dec. places

F 1: Knowledge to add

SF2: correct values used

A 1:Accurate answer

(3)

(4)

SF 2: substituted answer in

2.3 and correct expense

Amount

CA1: % calculated (Follow up

from answer in 2.3)

R1: rounding correctly (follow

up)

(4)

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