Samantha had to add this group of numbers (47 + 56 + 53), but she wanted to add them as quickly and as easily as possible. Here is how she decided to add the numbers: 47 + 56 + 53 = (47 + 53) + 56 = 100 + 56 = 156.

Which number property allowed her to add the numbers in this way?

the Commutative Property of Addition
the Associative Property of Addition
the Identity Property of Addition

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.