In this lesson you will learn about money: 美元s and cents.
这个单词“dollar”相当老，是该词的修改版本“thaler”. Thaler is what coins were called back in 1519 in Chech Republic. Later on, the English version of the name (dollar) was also applied to similar coins. Not only ones minted in central Europe but also the Spanish 要么 Portuguese money. The Spanish peso 要么 美元 were widely used in Britain’的北美殖民地，因为缺少官方的英国硬币。因此，在美国独立后，“dollar” was chosen as the name of its currency instead of keeping the British pound. There are many different theories regarding the 要么 igin of the symbol used to represent a 美元 ($).
You will learn and practice how to add and subtract 美元s and cents, as well as how to multiply and divide them. For example, if one item costs $2 and 50 cents and the other item costs $3 and 14 cents, what is the total cost of both items? We would add 美元s and cents separately and get: $2 + $3 = $5; 50 cents + 14 cents = 64 cents. The total cost is $5 and 64 cents.