Properties of the Rational Numbers

Which of the following are properties of rational numbers under addition?

Which of the following is the identity element under addition?

Which of the following is the identity element under multiplication?

So in short, the commutative property under addition states that, the order in which you add two numbers doesn't matter...

What property of rational numbers states that, a + b = b + a for rational numbers a and b?

Which of the following are properties of rational numbers under multiplication

The statement, ab = ba is an expression of what property of rational numbers under multiplication (a and b are rational numbers)

Which of the following is the identity element of the rational numbers under multiplication

What property of rational numbers states that, a(bc) = (ab)c ?

The statement, 4 x 9 = 9 x 4 is an expression of what property of rational numbers?

Do you feel comfortable with rational numbers and their properties?

How much study time do I need before tomorrows class?