Oh, dude, the union of integers and rational numbers is just all the numbers you can think of, like your whole math squad hanging out together. Integers are like the cool kids with no decimal parts, and rationals are the ones who can't decide if they want to be whole or have a fraction. So, when you put them together, it's just a big math party where everyone's invited.
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All integers are rational numbers. There are integers with an i behind them that are imaginary numbers. They are not real numbers but they are rational. The square root of 2 is irrational. It is real but irrational.
Fractions are not integers. They may or may not be rational numbers.
All integers are rational. Not all rational numbers are integers.
Any 2 digit integers are rational numbers because all integers or whole numbers are rational numbers.
Yes, integers are rational numbers. Rational numbers are defined as the set of numbers that can be expressed as the ratio of two integers, where the denominator is not zero. Since integers can be expressed as the ratio of itself divided by 1, they are considered rational numbers.