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Would you rather… Be given a million pounds on September 1st or be given a penny on September 1st, but everyday through September your balance doubles? Show working out to explain your answer.
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£0.01 £ £2,684, £0.02 £ £5,368, £0.04 £ £0.08 £1, £0.16 £2, £0.32 £5, £0.64 £10, £1.28 £20, £2.56 £41, £5.12 £83, £10.24 £167, £20.48 £335, £40.96 £671, £81.92 £1,342,177.28
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What did we do last week?
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MISLEADING GRAPHS What makes a graph misleading? What impact can this have on the reader?
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TRUE OR FALSE: Sales are rising rapidly!
4300 4310 4320 4330 4340 4350 4360 4370 2000 2001 2002 2003 2004 2005 Year Sales The graph is misleading because it suggests that sales have increased significantly over a five year period. In reality they have only increased by 70 units, which is not much given that they are selling thousands.
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Which is misleading? Why?
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Which is the better graph – why? Where is the spelling mistake?
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Scale made very small to make graph look very big
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Scale made very small to make graph look very big
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The scale is so compressed that it’s hard to see any difference among the brands.
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Although the vertical scale starts at 0, it does not go up in even steps. This distorts the graph, and makes it look as though the biggest jump is between 1 and 2, rather than 3 and 4. Also, there are no labels on the axes, so we have no idea what this graph represents!
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The graph suggests that the stock will continue to increase through 2020, but there’s no way to foresee the future.
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On this pictogram, there is no category for people who do not own a pet. The pictures are different sizes, and it appears that more people own a horse than any other animal. An improvement would be to redraw the pictogram, with each of the animals the same size and aligned with one another.
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TRUE OR FALSE: There are more 15 year old boys than girls.
15 year olds 16 year olds 18 year olds 17 year olds Girls Boys False. We cannot make this conclusion from these graphs because we don’t know the totals. There might be 10 boys in total, making roughly 5 aged 15, but 100 girls, 30 of which are 15. It only tells us the proportion of 15 year olds.
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TRUE OR FALSE: Twice as many people like Thrillers than Romance films.
5 20 25 40 60 100 120 150 Horror Favourite Films Number of People Comedy Action Romance Thriller The scale on the vertical axis is not linear, so even though the green bar is twice as big as the purple bar, it does not represent twice as many people.
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SUMMARY Scale doesn’t start at zero Scale is very small to make the data on the graph look really big Scale values or labels missing from the graph Sector labels and sizes missing from a pie chart Incorrect scale placed on the graph Size of images used in pictograms are different for the different categories
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TODAY Next week: Fractions and Percentages
Understand and use large and small numbers, including currency Calculate with the 4 operations - +, -, x and ÷ Follow BIDMAS (order of operations) Positive and negative numbers, square and cubed numbers Next week: Fractions and Percentages
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WHO AM I? Draw this grid on your whiteboard: Leave enough space to write a name and number next to each amount! £25,740,030 51,931,640 £40,100,000 £51,750,000 £34,621,093 £9,600,000 £149,440 £143,789 £25,216,800 £27,847,401 £0 £43,500,000
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Usain Bolt
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Theresa May
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Boris Johnson
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Lewis Hamilton
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Adele
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Jeremy Clarkson
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Daniel Radcliffe
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Pope Francis
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Queen Elizabeth II
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Jose Mourinho
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Ed Sheeran
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Simon Cowell
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Order your 12 celebrities from largest bank balance to smallest
(Put a number 1-12 next to their names)
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£51,931,640
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£51,750,000
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£43,500,000
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£40,100,000
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£34,621,093
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£27,847,401
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£25,740,030
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£25,216,800
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£9,600,000
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£149,440
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£143,789
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£0
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Adele £51,931,640 Daniel Radcliffe £51,750,000 Simon Cowell £43,500,00 The Queen £40,100,000 Lewis Hamilton £34,621,093 Ed Sheeran £27,847,401 Usain Bolt £25,740,030 Jose Mourinho £25,216,800 Jeremy Clarkson £9,600,000 Theresa May £149,440 Boris Johnson £143,789 The Pope £0
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INEQUALITY SYMBOLS An inequality shows that two values are not equal.
A < B says that A is less than B A > B says that A is greater than B
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Usain Bolt’s salary > The Queen’s salary
True or False? Usain Bolt’s salary > The Queen’s salary
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Lewis Hamilton’s salary > Jeremy Clarkson’s salary
True or False? Lewis Hamilton’s salary > Jeremy Clarkson’s salary
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Theresa May’s salary > The Pope’s salary
True or False? Theresa May’s salary > The Pope’s salary
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Simon Cowell’s salary > Adele’s salary
True or False? Simon Cowell’s salary > Adele’s salary
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True or False? 574 > 121
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True or False? 1249 < 578
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Number of days in a week > Number of sides of a nonagon
True or False? Number of days in a week > Number of sides of a nonagon
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Number of days in February < Number of days in October
True or False? Number of days in February < Number of days in October
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Number of degrees in a circle < Number of months in a year
True or False? Number of degrees in a circle < Number of months in a year
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True or False? Number of planets in the solar system > Number of blind mice in the nursery rhyme
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Number of Olympic rings > Number of days of Christmas
True or False? Number of Olympic rings > Number of days of Christmas
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ADDITION 104 + 51 9502 + 829 42 + 49 42 + 49 ____ 104 + 51 ____
Is the same as 2 + 4? Remember to keep units, tens and hundreds in line ____ 104 + 51 ____
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SUBTRACTION 160 - 74 7000 - 4320 48 - 21 160 48 - 74 - 21 ____ ____
Is the same as 2 - 4? Remember to keep units, tens and hundreds in line 48 - 21 ____ 160 - 74 ____
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MULTIPLICATION Is 4 x 2 the same as 2 x 4? Use the grid method
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3 x 7 12 x 7 45 x 7 39 x 47
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DIVISION 48 ÷ 4 ____ 4 | 4 8 120 ÷ 6 _____ 6 | 1 2 0 704 ÷ 3
Is 4 ÷ 2 the same as 2 ÷ 4? Use the bus stop method 48 ÷ 4 ____ 4 | 4 8 120 ÷ 6 _____ 6 | 1 2 0 704 ÷ 3
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÷ 8
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CHALLENGE
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INTEGERS What is an integer?
An integer is a positive or negative whole number, including zero.
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Rearrange these numbers from smallest to largest…
-10 5 33 -2 20 -10 -2 5 20 33 -1 2.5 -3 5 0.5 -3 -1 2.5 0.5 5
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TEMPERATURE How much has the temperature increased?
During winter the early morning temperature is -3°C. By lunchtime it is up to 6°C. How much has the temperature increased? HINT: Work out how many degrees it is from -3° to 0°, and then work from 0° to 6° morning lunchtime
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TEMPERATURE How much has the temperature decreased?
In the early afternoon the temperature is 3°C. By early evening the temperature goes down to -5°C. How much has the temperature decreased? HINT: Work out how many degrees it is from 3° to 0°, and then work from 0° to -5° afternoon evening
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MONEY TERMS What bills do people have to pay?
When money is added to your account, it is called credit When money is taken from your account, it is called debit
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ANSWER THIS QUESTION… 2 + 3 x 4
Type it into your calculator – what is the answer?
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√ Square Square root Square Square root Area = 3 x 3 = 3² 3 9 = 9
= 4² 4 16 Square root = 16
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cube cube Cube root Cube root
Volume = 3 x 3 x 3 Volume = 4 x 4 x 4 = 27 = 3³ = 64 = 4³ cube cube 3 27 4 64 Cube root Cube root
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FROM THESE NUMBERS… 1 3 8 12 16 20 13 15 2 17 24 6 Write down:
Write down: Factors of 6 Multiples of 4
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= 30 5 x = 25 9 ÷ = 3 = 3 = 100 6 x = 36 18 ÷ = 2 = 12 = 114 x 5 = 25 ÷ 4 = 4 = 3 = 30 9 x = 63 100 ÷ = 50 = 60 = 119 7 x = 49 100 ÷ = 25 - 199 = 1 = 299 x 8 = 56 100 ÷ = 5 = 103 = 320 10 x = 100 369 ÷ 3= = 22.5 = 89 20 x = 40 999 ÷ = 333 = -3
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= 30 5 x = 25 9 ÷ = 3 = 3 = 100 6 x = 36 18 ÷ = 2 = 12 =114 x 5 = 25 ÷ 4 = 4 = 3 = 30 9 x = 63 100÷ = 50 = 60 =119 7 x = 49 100÷ = 25 - 199 = 1 = 299 x 8 = 56 100 ÷ = 5 =103 =320 10 x = 100 369 ÷3= =22.5 =89 20 x = 40 999÷ =333 = -3 10 5 3 7 20 6 9 8 15 5 16 27 10 7 2 40 31 7 4 200 7 20 206 200 123 198 10 65.5 44.5 2 3 13
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