# Units of money - Examples, Exercises and Solutions

There are different types of currencies (different monetary units) in the world. For example, in some countries in Latin America, the peso is used, in others the dollar, and in several European countries, the euro is used.

Each of these monetary units is composed of smaller units. For example:

In one peso there are $100$ cents or centavos.

In one dollar there are $100$ cents or penny.

In one euro there are $100$ cents.

There are also exchange rates that allow us to convert amounts from one currency to another. Like the conversion between the peso and the dollar or dollar and euro.

For example, the exchange rate between the dollar and the Mexican peso today is:

$1$ dollar $17.50$ Mexican pesos.

Or, in words, one dollar is worth $17.50$ Mexican pesos.

Note that we have written that this is its value today, as the exchange rate varies constantly influenced by many economic factors. This topic is really interesting, but it is not related to our article.

## Practice Units of money

### Answer

$3.79$

### Exercise #4

Complete the corresponding sign:

14 coins of 2 $and 1500 coins of 10 cents

or

2 bills of 20$

$2\times20~(?)~14\times2+1500\times\frac{1}{10}$

<

### Exercise #5

Fill in the missing sign (?) so that the following corresponds to the expression underneath:

$29.9 or 2 coins of$10 , one coin of $5, 2 coins of$2, one coin of half a dollar, and 3 coins of 10 cents.

$2\times10+5+2\times2+\frac{1}{2}+\frac{3}{10}?29.9$

<

### Exercise #1

I have two 50 $bills,

Three coins of 5$

### Answer

$312,750$

### Exercise #5

Fill in the missing sign (?) so that the following corresponds to the expression underneath:

27 coins of 10 cents and 13 coins of 50 cents

or

4 coins of 2 dollars and 3 coins of 50 cents

$4\times2+3\times\frac{1}{2}?27\times\frac{1}{10}+13\times\frac{1}{2}$

>