When my students grow too dependent on their calculators, I ask them to find a number that, when multiplied by itself, gives them 2. Students quickly see that since 1² = 1 and 2² = 4, the answer has ...

Rational numbers are those that can be expressed as a fraction of two integers, where the denominator is not zero. Rational numbers include fractions, decimals, and mixed numbers. Recognizing rational ...