Lesson 7 Exchange Rates and Conversion graphs. Mathswatch 64.
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Transcript of Lesson 7 Exchange Rates and Conversion graphs. Mathswatch 64.
![Page 1: Lesson 7 Exchange Rates and Conversion graphs. Mathswatch 64.](https://reader035.fdocuments.in/reader035/viewer/2022062304/56649cdc5503460f949a72ed/html5/thumbnails/1.jpg)
Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64
![Page 2: Lesson 7 Exchange Rates and Conversion graphs. Mathswatch 64.](https://reader035.fdocuments.in/reader035/viewer/2022062304/56649cdc5503460f949a72ed/html5/thumbnails/2.jpg)
GCSE Maths Starter 7
2. Expand x(x + 3)3. Evaluate 32.9 x 17 (no calc)4. Increase $72 by 15% (no calc)
5. Which of the shapes below are congruent?
1) Find the median and range of the stem and leaf below.
A
D
B
EC
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• To interpret conversion graphs.• To calculate the conversion between two
types of units.• To solve problems involving conversions.EXTN: To establish best value using conversion of units. (Grade C)
Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64
![Page 4: Lesson 7 Exchange Rates and Conversion graphs. Mathswatch 64.](https://reader035.fdocuments.in/reader035/viewer/2022062304/56649cdc5503460f949a72ed/html5/thumbnails/4.jpg)
Why would you convert currency?
Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64
![Page 5: Lesson 7 Exchange Rates and Conversion graphs. Mathswatch 64.](https://reader035.fdocuments.in/reader035/viewer/2022062304/56649cdc5503460f949a72ed/html5/thumbnails/5.jpg)
What is an exchange rate?
Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64
![Page 6: Lesson 7 Exchange Rates and Conversion graphs. Mathswatch 64.](https://reader035.fdocuments.in/reader035/viewer/2022062304/56649cdc5503460f949a72ed/html5/thumbnails/6.jpg)
I know £1 = ฿43.56 (Thai Baht) what would I do to find how much £100 is?
So to convert between £ and ฿ you need to x 43.56
X 43.56
£1 = ฿43.56
Convert the following amounts to Thai Baht.a) £10 b) £50 c) £135
£100 x 43.56 Baht = 4356 Baht
435.60 Baht 2178 Baht 5880.60 Baht
Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64
X 43.56 X 43.56 X 43.56
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I know £1 = ฿43.56 (Thai Baht) how would I work out how many pounds, 1000 Baht is?
So to convert between £ and ฿ you need to ÷ 43.56
÷ 43.56
£1 = ฿43.56
Convert the following amounts to British Pounds (GBP).a) 200 Baht b) 1400 Baht c) 70 Baht
1000 Baht ÷ 43.56 = £22.95684114= £22.96
£4.59 £32.14 £1.61
Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64
÷ 43.56 ÷ 43.56 ÷ 43.56
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New York, USA £1 = $1.51 I now take my family to New York. I
convert £350 to US Dollars. a) Calculate how many US dollars I
have?
b) I spend $276 on my visit to New York and return to England. I convert my remaining money to Pounds. Calculate the remaining to GPB (£)?
350 x 1.51 = $528.50
$528.50 - $276 = 252.50 252.50 ÷ 1.51 = £167.22
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Sydney, Australia £1 = $1.45
I now take my family to Sydney. I convert £1200 to Australian Dollars.
a) Convert £1200 to Aussie Dollars?
b) I spend $1476 Dollars whilst in Sydney. I convert the remaining currency back to Pounds. How many pounds and pence do I have?
1200 x 1.45 = $1740
$1740 - $1476 = $ 264 $264 ÷ 1.45 = £182.07
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In the UK, petrol cost £1.24 per litre. In the USA, petrol cost 3.15 dollars per US
gallon.
1 US Gallon = 3.79 Litres£1 = $1.51
UK or USA? Show why?
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In the UK petrol is £1.24 per litre.1.24 x 1.51 = $1.87 per litre (convert to US dollars)
In the US Petrol is $3.15 per gallon3.15 ÷ 3.79 = $0.83 per litre
So we see that petrol is cheaper in the US
Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64
![Page 12: Lesson 7 Exchange Rates and Conversion graphs. Mathswatch 64.](https://reader035.fdocuments.in/reader035/viewer/2022062304/56649cdc5503460f949a72ed/html5/thumbnails/12.jpg)
EXAMPLES1) 2)
Use the conversion graph to convert:(a) 70 kg to pounds(b) 120 pounds to kg
Use the conversion graph to convert:(a) 30 gallons to litres(b) 400 litres to gallons
154 lbs
154 pounds
54 kg
54 kg
137 litres
88 gallons
137 litres88 gallons
Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64
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1)
10cm
23cm
2in
8.75in
2.5cm
Read off the value for 9in (23cm) and multiply this by 2 (46cm)
Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64
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Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64
![Page 15: Lesson 7 Exchange Rates and Conversion graphs. Mathswatch 64.](https://reader035.fdocuments.in/reader035/viewer/2022062304/56649cdc5503460f949a72ed/html5/thumbnails/15.jpg)
• To interpret conversion graphs.• To calculate the conversion between two
types of units.• To solve problems involving conversions.EXTN: To establish best value using conversion of units. (Grade C)
Lesson 7 Exchange Rates andConversion graphs.
Mathswatch 64