Answer:
Associative property: The addition or multiplication of a several numbers is the same regardless of how the numbers are grouped. The associative property will always involve 3 or more numbers. The parenthesis groups the terms that are considered one unit.
For 61 you can change it to √25/√49. √25=5 and √49=7 so it would simplify to 5/7.
Do the brackets first as it says in BIDMAS
Answer:
a number to be divided by another number
To write down notes while you are in the class because I find it easier to explain it to yourself. You can use flashcards or study your textbook. I find the first suggestion best.