A number line always starts at zero. The numbers to the right are ordered in sequence and are positive whole numbers.
EXAMPLE: 0 1 2 3 4 are positive numbers.
The numbers to the left of zero are negative.
EXAMPLE: 4 3 2 1 0
The order the numbers are in is just like you would count normally.
Negative 4 3 2 1 0 1 2 3 4 Positive
A number line is a line of which numbers are ordered on. Usually from 1 to 100.
Coordinate planes
Because if they did not, then they would not be number lines!
The two perpendicular number lines used for graphing ordered pairs of numbers are called the Cartesian coordinate system. The horizontal axis is known as the x-axis, while the vertical axis is called the y-axis. Together, they create a two-dimensional plane for plotting points based on their coordinates.
They are the x and y axes on the Cartesian plane that intersect each at right angles at the point of origin which is (0, 0)
numbers get smaller as you move to the left on the number line number lines can't help you compare numerals
There are infinitely many numbers between any two different numbers. To find a number exactly in the middle between two numbers, calculate the average. That is, add the two numbers, then divide the result by 2.
The Mayans used a combination of dots and lines to represent their numbers. The number thirteen is represented by three dots on top of two horizontal lines.
Even numbers can be matched up in two lines. Odd numbers have one left over.
You model your equation on a number line to using a bar model.
A factor tree is very useful when identifying the prime factors of a number. You draw two lines off of it and write two numbers that multiply together to make that number. If one of the numbers cannot be divided any further, then circle it. That is a prime number. Draw two lines off of numbers that can be divided further, so you have multiple branches dividing off into certain numbers. Once all the numbers have been divided down, you are left with prime numbers which you can then multiply to get back to the original number.
Numbers were named after the number of angles they represented, and each angle represented a quantity. For example, the number one has one angle, number two two and so on. They have to be written with straight lines (not curved).