No. A rational number can also have repeated decimals, like 1/3 = 0.33333... or 1/7 = 0.142857 142857 142857 ...
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Every integer is a rational number.
No but every integer is a rational number and numbers that can be expressed as fractions are also rational numbers
Every whole number is rational.
No. Every rational number is not a whole number but every whole number is a rational number. Rational numbers include integers, natural or counting numbers, repeating and terminating decimals and fractions, and whole numbers.
Every rational number can be expressed as a fraction. It's what rational means- a number that can be expressed as a ratio (fraction) of integers.