Powers and roots

Powers 

Powers are very useful to express some multiplications in a short form. This video shows you what a power  is, what the base and the exponent are, and the different forms of expressing a power. 

Power song

·     In the next link you will find the lyrics of this song with some gaps. You can print and try to fill them in by yourself according to the video.


 Powers song's lyric.

          Order  of operations

      Remenber what you shoud do when you have to calculate an arithmetic expression: First of all, you must calculate brackets and parenthesis. Second,  powers and roots. Third,  multiplications and divisions from left to rigth. Finally,  additions and subtractions  from left to right. Here  are two videos tha can help you understand these calculations.

      Order of operations I

 Order of operations II