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Maths Literacy Term 2 Content and teaching ideas
Brought to you by Sharp and SMD Technologies
Agenda
ā¢ Sharpies
ā¢ Basics
ā¢ Topicsā¢ Finance
ā¢ Measurement
ā¢ Maps, plans and other representations
ā¢ Probability
ā¢ Data Handling
Sharpies
ā¢ A reward program just for teachers
ā¢ Earn points for attending this webinar.
ā¢ Exchange your points for gifts.
ā¢ Sign up ā link
ā¢ Tell all your friends - link
Free Downloads and Resources
ā¢ Download the simulatorā¢ Link
ā¢ Download Geogebraā¢ Link
ā¢ Worksheetsā¢ www.mathsatsharp.co.zaā¢ www.e-classroom.co.zaā¢ www.math-drills.comā¢ https://www.mathx.net/ā¢ https://www.worksheetworks.com/ (one of my favourites for younger grades
and fully customisable)ā¢ https://www.mathwarehouse.com/sheets/ (FET mostly)
ā¢ ATP documents (link)
Calculator Introduction
ā¢ 640 Functions
ā¢ Upgraded for the CAPS and AP maths curriculum
ā¢ Amazing new functions include a multiplicand function, highest common factor, lowest common multiple and many more!
ā¢ Download the simulator from www.mathsatsharp.co.za
Calculator Basics
ā¢ Turn the calculator on
ā¢ 2nd Function ā used to activate orange functions
ā¢ Turn the calculator off by pressing 2nd F and ON
ā¢ ALPHA ā used to activate teal functions
ā¢ Mode ā change to different modes
ā¢ BS ā backspace ā to delete something.
ā¢ Change ā change between mixed, improper and decimal answers.
ā¢ Equals ā to find an answer or used as enter.
Modes
ā¢ Press
ā¢ 0: Normalā¢ Fractions, integers, probability,
trigonometry and much more
ā¢ 1: Statā¢ Single data, linear regression and more
ā¢ 2: Tableā¢ Functions but can also be used for
teaching finance and factorising
ā¢ 3: Complexā¢ For doing complex number calculations
ā¢ 4: Equationā¢ Solving various equations ā linear,
quadratic and cubic.
Finance
Finance - Budgets
ā¢ A financial plan for your expected income and expenses
ā¢ Fixed expenses ā those monthly costs that are the same every month.
ā¢ Flexible costs ā those monthly costs that change from month to month, depending on how much you use.
ā¢ Income ā how much money you are earning per month.
ā¢ Template
Till Slip
ā¢ Where purchased from
ā¢ Date and time
ā¢ Payment method
ā¢ How many litres
ā¢ Total cost
ā¢ Loyalty program
Online Receipt/Tax Invoice
ā¢ Date
ā¢ Items purchased
ā¢ Tax/ Vat amount
ā¢ Total due before vat
ā¢ After vat
ā¢ Amount paid
Tariff Systems
ā¢ Pay attention to the story details.
ā¢ Read your tables very carefully.
Chocolate Vanilla
Less than 100 R6 each R5 each
More than 100 R5.50 each R4.50 each
Simple Interest
ā¢ š“ = š(1 + š Ć š)
ā¢ Press
ā¢ E.g. A = 1000 (1+ 5% x n)
ā¢ Press
ā¢ Press
Hire Purchase
ā¢ The purchase of a ābig ticketā (more expensive) item that is paid off through a deposit and simple interest.
ā¢ Steps:ā¢ Work out how much the deposit is. ā¢ Work out how much is left to pay
(this is your P value)ā¢ Work out your final amount to pay
(over the time given)ā¢ Divide this by the number of
months (or whatever period is given) to work out the monthly payment.
Example:
ā¢ Mandisa decides to purchase a lounge suite from House and Home. Here is a picture of the advert:
ā¢ a) If Mandisa pays a 15% deposit, how much will she have to take out a hire purchase loan for?
ā¢ b) House and Home charges her 22% interest per year, with the loan payable over 3 years. What is the total amount Mandisawill have to pay back?
ā¢ c) If she also pays a monthly insurance of R29 and administration fee of R13, how much will Mandisa have to pay a month.
ā¢ d) How much more is Mandisa spending because she bought the lounge suite on hire purchase, than paying the cash price.
a)
ā¢ If Mandisa pays a 15% deposit, how much will she have to take out a hire purchase loan for?
ā¢ Total amount = R 14 999
ā¢ Deposit = R14 999 x 15%
ā¢ On the calculator press
ā¢ Now we say R14 999 ā R2 249.85
Bonus shortcut āŗ
ā¢ Press
b)
ā¢ House and Home charges her 22% interest per year, with the loan payable over 3 years. What is the total amount Mandisa will have to pay back?
ā¢ So what do we have?
ā¢ A = ?
ā¢ P = R12 749.15
ā¢ i = 22%
ā¢ n = 3 years
ā¢ Formula: š“ = š 1 + š Ć š
ā¢ Substitute: š“ = 12 749.15 1 +22
100Ć 3
ā¢ On the calculator:
ā¢ Press
c)
ā¢ If she also pays a monthly insurance of R29 and administration fee of R13, how much will Mandisa have to pay a month.
ā¢ First, we find how many months Mandisawill have to pay for the lounge suite:
ā¢ 3 x 12 = 36 months
ā¢ Next we divide the total found in b) by 36:ā¢ 21 163.589 Ć· 36
ā¢ = 587.88
ā¢ Press
ā¢ Now we add the monthly total calculated to the insurance and admin fee:
ā¢ = R587,88 + R13,00 + R29,00
ā¢ = R629,88
d)
ā¢ How much more is Mandisaspending because she bought the lounge suite on hire purchase, than paying the cash price?
ā¢ She pays over 36 monthsā¢ = R629,88 x 36
ā¢ = R22 675,59
ā¢ How much more means subtract the original from the end total (donāt forget the original deposit)
ā¢ = R22 675,59 + R2 249,85 ā R14 999
ā¢ = R9 926,44
Inflation Rate
ā¢ The inflation rate is the average percentage increase in a price basket over a certain period.
ā¢ We use the percentage increase formula:
ā¢ šš. ššš”š =ššš¤ ššššš āššš ššššš
ššš šššššĆ 100
ā¢ E.g. šš. ššš”š =15.88 ā13.79
13.79Ć 100
ā¢ Isā¦.
Fuel Price Date
R 13.79 02-01-2019
R 13.86 06-02-2019
R 14.60 06-03-2019
R 15.94 03-04-2019
R 16.48 01-05-2019
R 16.57 05-06-2019
R 15.61 03-07-2019
R 15.72 07-08-2019
R 15.83 04-09-2019
R 15.79 02-10-2019
R 15.66 06-11-2019
R 15.88 04-12-2019
Exchange Rates
ā¢ Pay attention to the ādirectionā of the exchange.
ā¢ E.g. $1 = R14.52ā¢ Small to big
ā¢ If we have $10, how many Rands do we have?
ā¢ Small to big so we multiply
ā¢ If we have R1000, how many Dollars can we buy?
ā¢ Big to small so we divide
ā¢ Exchange rate = R1 = $0,069ā¢ Big to small
ā¢ If we have R10 how many Dollar do we have?
ā¢ Big to small, so we multiply
ā¢ If we have $100, how many Rands do we have?
ā¢ Small to big so we divide.
ā¢ Note: going in the same direction means multiply, going in the opposite direction means divide.
Measurement
ConversionsE.g. Ounces to gramsā¢ 23 ounces:
ā¢ Press 23
ā¢
ā¢ Press until you find oz ā g
ā¢ Press
ā¢ There are 44 different conversions.
DMS / Time Functions
ā¢ Changing minutes to hours
ā¢ E.g. How many hours are 470 minutes?
ā¢ Press to clear any chain calculations
ā¢ Press
ā¢ Press to change it into fraction or decimal format (remember to use your button).
29
DMS/ Time Functions
ā¢ Finding time in a speed-distance-time calculation.
ā¢ E.g. How long does it take to travel 450km at an average speed of 117km/h?
ā¢ Press
ā¢ Press
ā¢ Press
ā¢ The answer is 3 hours, 50 minutes and 46.154 seconds.
30
DMS / Time Functions
ā¢ Adding / Subtracting Time
ā¢ E.g. find the length of time spent on a bus if the bus left at 9.45 and arrived at 12.32.
ā¢ Press
ā¢ The answer is 2 hours and 47 minutes
ā¢ To change back to a fraction notation press
31
Calculating BMIā¢ BMI = Body Mass
Indexā¢ It measures your level of weight
health.
ā¢ BMI = š¤šššāš”
āšššāš”2
ā¢ Weight in kg
ā¢ Height in m
ā¢ E.g. Tony weighs 120kg and is 1.85m tall. What is his BMI?
Calculating Surface Area
ā¢ Formula for cube: 6š2
ā¢ Formula for rectangular prism = 2āš + 2šā + 2 šš
ā¢ E.g. find the surface area of a tissue box that measures 12cm across, 10cm high and 20cm wide.
ā¢ šš“ = 2 10 20 +2 12 10 + 2 12 20
ā¢ šš“ = 1 120 šš2
Maps, Plans and Other Representations
Scale
ā¢ A ratio calculation.
ā¢ E.g. map scale 1cm = 2km.
ā¢ If you measure 6cm on the map, what is the measurement in real life?
ā¢ If a park measures 3km by 4km what will its area be on the map?
Giving Directions
ā¢ Make it fun āŗ
ā¢ This ties into language and life skills so its important that students can do this.
ā¢ Also ā taking directions is an important skill.
Probability
Probability
ā¢ Press
ā¢ The random function:
ā¢ Pressā¢ 0: Random
ā¢ Random decimals between 0 and 1 to 3 decimal places
ā¢ 1: R.Diceā¢ Random numbers between 1 and 6
ā¢ 2: R.Coinā¢ Heads and Tails displayed as 0 or 1
ā¢ R.Int(ā¢ Random whole number between
any two numbers given
Theory
ā¢ Theoretical probabilityā¢ The expected outcome based
on the information we haveā¢ E.g. rolling a 1 on a 6-sided
dice has a 1
6chance.
ā¢ Rolling a 7 on a 6-sided dice has 0 chance because 7 is not on the die.
ā¢ Relative frequencyā¢ The actual results based on the
number of āexperimentsā performed.
Die Roll Tally Total
1
2
3
4
5
6
Tree Diagrams
ā¢ Give a visual representation of the possible probabilities
ā¢ With replacement
ā¢ Means that the probabilities stay the same across the branches.
ā¢ Without replacement
ā¢ Means that the probabilities change based on what happened in the previous round.
ā¢ A spinner with five equal parts (numbered 1 to 5) is spun and another spinner with three equal parts (with the colours red, blue and yellow) is spun afterwards.
Two-Way Tables
ā¢ Show us the relationship between 2 categorical variables
ā¢ Two ways to read probabilities from the table:
ā¢ Big picture (one criterion)ā¢ E.g. What is the chance of
selecting a man from the group interviewed?
ā¢ Details. (2 criterion)ā¢ E.g. What is the chance of
selecting a woman who is studying maths from the group interviewed?
Men Women Totals
Maths 46 25 71
Math Lit 28 49 77
Totals 74 74 148
Some random things to do
ā¢ Create tally tables
ā¢ Create a poll on zoom
ā¢ Play snap in break away rooms
ā¢ Use it to test multiples, finding factors and so on.
ā¢ My favourite is the lotteryā¢ Which you could do through the
chat function so no cheating happens āŗ
Data Handling
Collecting Data
ā¢ Keep an eye out for biased data.
ā¢ Sample vs population
ā¢ Size of sample, vs size of population
ā¢ How does your choice of sample affect your outcome?
Displaying Data: Pie Chart
ā¢ To calculate the angle of one slice of pie:
ā¢ š šššš =ššššš¢š
š”šš”ššĆ 360
ā¢ š šš =31
190Ć 360
ā¢ = 59Ā°
ā¢ To calculate the percentage of one slice of pie:
ā¢ š šššš =ššššš¢š
š”šš”ššĆ 100
ā¢ š šš =31
190Ć 100
ā¢ = 16.32%
Colour Frequency
Red 31
Blue 33
Orange 42
Green 40
Pink 44
Total 190
Box and Whisker Plots
ā¢ First we need to find our 5-number summary:
ā¢ Minimum
ā¢ Quartile 1
ā¢ Median
ā¢ Quartile 3
ā¢ Maximum
ā¢ Then we draw our box and whisker plot
This Photo by Unknown Author is licensed under CC BY-SA
Example
ā¢ 52 53 71 75 75 76 79 82 96
ā¢ So:ā¢ Minimum = 52
ā¢ Quartile 1 = 62
ā¢ Median = 75
ā¢ Quartile 3 = 80.5
ā¢ Maximum = 96
On the calculator
ā¢ Press
ā¢ Type in the data:
ā¢ Clear the table by pressing
ā¢ To find the 5-number summary:
ā¢ Use your down arrow key to get to the 5-number summary:
Exampleā¢ Given below is the box and whisker plot of the data for Danielleās scores (out of 50) she received for
the 20 different dance routines she did over the last 6 months.
ā¢ a) Give the range of scores Danielle receives.
ā¢ b) How many scores did Danielle get between 24 and 41?
ā¢ c) How many scores did Danielle get between 17 and 41?
ā¢ d) What can you say about the spread of Danielleās scores?
ā¢ e) If Danielleās top 25% of scores occurred in the last two months, what can we say about Danielleās dancing?
ā¢ f) In order to go through to the next round, you need to score more than 40. In how many competitions did Danielle go through to the next round?
Summarising Data
ā¢ Mean ā the average
ā¢ Mode ā appears the most
ā¢ Median ā in the middle
ā¢ Range ā highest result minus the lowest result.
Comments
ā¢ EL-W506T is the perfect calculator for AP and IEB maths curriculum
ā¢ Can be ordered in bulk from SMD directly at better than retail pricing.
ā¢ Available at Takealot, PNA, Loot, Makro and more!
Junior Calculator
ā¢ EL-W535SA ā cheaper and 422 functions
ā¢ Ideal for grade 7 ā 9 students
ā¢ 500 000 calculators given to No-Fee school students in Gauteng by the department of education
ā¢ With a 40% improvement between the pre- and post-tests after training.
Thank you for your valuable time!
Free worksheets and simulator:
www.mathsatsharp.co.za