How to add positive numbers on a number lineĪs we already know, when two positive numbers are added, the sum will always be positive.This method of teaching is important because, the students are able to visualize the operations and therefore be able to learn and understand quickly. Number lines can be used to teach children how to do addition and subtraction of simple numbers. Do the same procedure to the left of the origin by plotting numbers starting from -1, -2, -3…… etc.On the right of the origin, plot the marked points starting from +1, +2, +3…… etc.Draw a straight horizontal line of some suitable length.Arrows are put on the ends of the horizontal line to show that the line continues to infinity. Positive numbers are plotted to the right of the origin while negative numbers are plotted to the left of the origin.
You can remember the origin is zero by applying this mnemonic: “ The origin of most things is nothing.” In the middle, we the origin usually plotted with zero. An example of a set of whole numbers is:(0, 1, 2, 3,4,5,6 …….) whereas the natural number include:1, 2, 3, 4, 5, 6….Ī number line is composed of three basic parts. Numbers on a number line include all sets of numbers namely natural and whole numbers.
A number line can be used as a tool for comparing and ordering numbers and also performing operations such as addition and subtraction. The Number Line – Explanation & Examples What is a Number Line?Ī number line is defined as the pictorial representation of numbers such as fractions, integers and whole numbers laid out evenly on a straight horizontal line.
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