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# 15. Example 3 – Exchange Rates – continued

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Last updated 26 October 2012 15:30 by NZTecAdmin

Option 2: Make up a rule or equation
You could try a flow chart that converts \$NZ into Euros.

The problem here is to work out the exchange rate. Try the info you are given:

So 780r = 370 so r = 370 ÷ 780 (r0.47)

Your rule for converting \$NZ to Euro is e = r (k-20) where e = the number of Euros, k = number of \$NZ and r = the rate.

Question: How can you reverse the flowchart to find the rule for how many \$NZ a certain number of Euros will cost?

Extensions: Try other exchange rates. For example \$NZ1000 = \$US709.

17 November 2016 06:24
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