The number we have our point on is our answer, i.e. (Notice the change- we move left and not right as we did in addition)Ĥ. Move 2 points left as we have to add the numbers. We proceed in the same manner we did for addition.ģ. Suppose we want to obtain the value of 3 – 2 This can be better understood through the visual depiction of subtraction in the example below – Subtraction on a number line is similar to what we do in addition with the only difference being that instead of moving right on the number line, we move left. Hence 3 + 2 = 5 Subtraction on a Number Line Move 2 points right as we have to add the numbers.Ĥ. Mark the first number 3 on this number line.ģ. First draw a number line having both negative as well as positive numbers.Ģ.
#TOUCH POINT MATH FLASH CARDS HOW TO#
The following example shall help you understand how to add two numbers to a number line.ġ. We move to the right on our number line for adding two numbers. The number line is one of the methods that allow visually understanding of these operations. The four basic operations- addition, subtraction, multiplication, and division are the fundamentals of mathematics. Hence the increasing orders of the numbers -2, 8 and 3 is Out of the three given numbers, -2 is on the farthest left while 8 is on the farthest right placing 3 between these numbers. The farther a number is on the right, the greater it is.įor example, let us consider the following numbers: -2, 8 and 3 Finding out the greater number among two or more numbersĪ number line helps you visualize which is a greater number among two or more numbers. Not just this, you get the choice of choosing the intervals between the numbers as well while creating a vertical number line. For instance, here is one of the vertical number lines that we have for you – It is not that you always need to plot numbers on a number line in a horizontal manner. But, is it possible to place the numbers in a vertical manner? Yes, it certainly is possible. When we think of a number line, we almost always think of numbers placed on a horizontal line. Can Number Lines be placed only in a horizontal manner? Which number it would be sitting on now?Īnswer: Make the ball jump 5 points towards its left and you would find that it lands on the number -2. Suppose the ball in the example above moves 5 points towards its left side. On which number is the ball sitting on?Īnswer: Count the points from 0 and you will notice that the ball is sitting on number 3.Ģ. As is clearly visible, as we move from left to right, there is an increase in the value of numbers while it decreases when we move from right to left. Here are some areas where number lines have been found to be extremely useful – Representation on a Number LineĪbove is a visual representation of a standard number line. They serve a purpose for the very basic understanding of the concept of numbers and how they move upwards or downwards in the counting tables. Number Lines are not just an initial representation of numbers on a line. A number line demonstrates the addition, subtraction, multiplication as well as division of numbers, be it integers, fractions or decimals.A number can line can be useful for understanding the comparison as well as the ordering of numbers.The farther a number is on the right, the greater it is. A number line helps you visualize which a greater number among two or more numbers is.What is the purpose of a number in understanding numbers in mathematics? Positive Numbers – The positive numbers are plotted to the right of the point 0 or the origin.Ībove is a visual representation of a standard number line.Origin – The number zero ( 0 ) is considered as the origin of the number line and is usually plotted at its centre.Negative Numbers – The negative numbers are plotted to the left of the point 0 or the origin.A number line can be divided into three parts – Finding out the greater number among two or more numbersĪ number line consists of a ray on which the numbers are plotted in an increasing order from left to right.Can Number Lines be placed only in a horizontal manner?.
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