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Answer:
What is a Number Line?
A 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. A number line can be used as a tool for comparing and ordering numbers and also performing operations such as addition and subtraction.
Numbers on a number line include all sets of numbers namely natural and whole numbers. 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….
A number line is composed of three basic parts. In the middle, we the origin usually plotted with zero. You can remember the origin is zero by applying this mnemonic: “The origin of most things is nothing.”
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Positive numbers are plotted to the right of the origin while negative numbers are plotted to the left of the origin. Arrows are put on the ends of the horizontal line to show that the line continues to infinity.
To come up with a number line:
Draw a straight horizontal line of some suitable length.
Mark points of equal interval.
Plot the middle point with zero.
On the right of the origin, plot the marked points starting from +1, +2, +3…… etc.
Do the same procedure to the left of the origin by plotting numbers starting from -1, -2, -3…… etc.
Number lines can be used to teach children how to do addition and subtraction of simple numbers. This method of teaching is important because, the students are able to visualize the operations and therefore be able to learn and understand quickly.
Addition using number
Step-by-step explanation:
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