Investigate to do these tasks. Cite your source. Writeba mathematical expression involving addition and subtraction to describe any increase or decrease. Compare the following:
The current exchange rate of 1 US dollar to Phillippine peso to exchange rate 1 year ago.
Source: ___________________________________________________
The current exchange rate of 1 US dollar to Phillippine peso to exchange rate 1 year ago.
Source: ___________________________________________________
Answers & Comments
Answer:
The mathematical expression to describe any increase or decrease is: (Current Exchange Rate - Exchange Rate 1 Year Ago) + (Exchange Rate 1 Year Ago - Current Exchange Rate).
Source: Khan Academy, "Addition and Subtraction of Real Numbers", https://www.khanacademy.org/ math/algebra/real-numbers/ addition-subtraction-real-numbers/ v/addition-and-subtraction-of-real- numbers
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