Number line is a widely used concept in mathematics. It is used to represent, compare, add and subtract real numbers.
A number line is usually a horizontal straight line on which every point corresponds to a real number. These points are evenly-spaced on the line extending in both the directions.
- The number line divided into two symmetric halves by the number zero, called the origin of the number line.
- The values on the right side of zero are positive and increasing.
- The values on the left side of zero are negative and decreasing.
- The number on the left is smaller than the number on the right.
Examples:
– 2 is smaller than 4
– -3 is smaller -2
– -1 is smaller than 3
– -4 is smaller than 0
