Real Numbers

Mathematics — Second Preparatory

Lesson summary

The real numbers R = rational numbers Q ∪ irrational numbers.
A rational number can be written as a fraction. Its decimal form either terminates or repeats.
An irrational number has a decimal form that neither ends nor repeats. The square roots of non-perfect squares are irrational.
√(perfect square) is rational. √(non-perfect square) is irrational.
Every real number has a point on the number line. We locate it by comparing its square with the squares of integers.

Real Numbers · 7 / 7