1,000

100,000

1,000,000

21

47

86

2.54

4.06

0.23

Thousands of people watched our TV show yesterday

450

5,001

\(u_0\)

\(\left \lceil{x}\right \rceil\)

\(\left \lfloor{x}\right \rfloor\)

The opposite number (or just opposite) of a number

The price has increased by 50%

A closed interval

Non-negative

Positive

Non-positive

Negative

Non-decreasing

Increasing

1,000,000,000