Note some examples of operations involving angle measurements.

## Addition

- 30º48' + 45º10'

- 43º18'20" + 25º20'30"

- 10º36'30" + 23º45'50"

Simplifying 33º81'80 ", we get:

Therefore, the sum is 34º22'20 ".

## Subtraction

Take a look at the examples:

- 70º25' - 30º15

- 38º45'50" - 27º32'35"

- 90º - 35º49'46"

- 80º48'30" - 70º58'55"

Notice that:

So the difference is 9º 49'35 ". Next: Operations (multiplication and division by natural number)