Math Problem Statement

On March 8, 2017, one British pound was worth 1.23 U.S. dollars. (a) On that date, how many dollars was 180.46 pounds worth? Round your answer to the nearest hundredth of a dollar. (b) On that date, how many pounds was 17.63 dollars worth? Round your answer to the nearest hundredth of a pound.

Solution

Let’s solve the questions step by step:


Given Data:

  • 1 British Pound (£) = 1.23 U.S. Dollars ($)

(a) How many dollars was 180.46 pounds worth?

To convert pounds to dollars, use the formula: Dollars=Pounds×Exchange Rate\text{Dollars} = \text{Pounds} \times \text{Exchange Rate} Substitute the values: Dollars=180.46×1.23=221.9658\text{Dollars} = 180.46 \times 1.23 = 221.9658 Round to the nearest hundredth: Dollars=221.97\text{Dollars} = 221.97

Answer: $221.97


(b) How many pounds was 17.63 dollars worth?

To convert dollars to pounds, use the formula: Pounds=DollarsExchange Rate\text{Pounds} = \frac{\text{Dollars}}{\text{Exchange Rate}} Substitute the values: Pounds=17.631.23=14.34146341\text{Pounds} = \frac{17.63}{1.23} = 14.34146341 Round to the nearest hundredth: Pounds=14.34\text{Pounds} = 14.34

Answer: 14.34 pounds


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Follow-up Questions

  1. How do you calculate currency conversions with different exchange rates?
  2. What does "rounding to the nearest hundredth" mean in mathematical terms?
  3. Can you explain how exchange rates fluctuate over time?
  4. How would the results change if the exchange rate were 1.30 instead of 1.23?
  5. How can you verify the correctness of a currency conversion calculation?

Quick Tip:

Always double-check rounding instructions to avoid minor errors in calculations, especially when handling money!

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Math Problem Analysis

Mathematical Concepts

Currency Conversion
Multiplication
Division
Rounding Numbers

Formulas

Dollars = Pounds × Exchange Rate
Pounds = Dollars ÷ Exchange Rate

Theorems

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Suitable Grade Level

Grades 6-8