Positive Numbers in Grade IV

Hello friends, now in this chapter of the mathematics for grade IV, we are going to get introduced by number and some of their particular types as positive and negative numbers. We will learn some operations on them and their way of representation. Number is a mathematical entity or object which is used to represent the quantity. Numbers are used to count and measure the quantity in the real world. The number has a lot of definition in the term of their types for example negative numbers (numbers with - sign), positive numbers (all integers greater than zero), rational numbers (a / b ), complex numbers and many more. All of the mathematical operations are applied on the numbers for example addition, subtraction, multiplication and division are performed on numbers. (Also read on how to solve proportions to improve your math knowledge)

These are the operations that takes numbers and performs the operation to produce the specific result as output. Some operations like unary operation that takes single number as input and produce another single number, binary operations takes two numbers as input and produces a single output number. In the grade IV addition, subtraction, multiplication, division and exponentiation are some types of binary operations.  All the numeric operations performed in math are the part of arithmetical mathematics. Numerals are some types of symbols which are used to represents the numbers in mathematics. (more on positive numbers here)

Now talking about the types of numbers, we have a types of numbers. For example, natural numbers like computable numbers (1, 2, 3, 68, 10003, etc.), integers, rational numbers, real numbers (13.46 type decimal numbers), complex numbers(x + iy), and some specifically used numbers. The numbers which are named due to their sign are as negative numbers (having negative sign before them), positive numbers, infinity and infinitesimals (not having end limit or can’t be counted) and even numbers ( number divisible by two) and odd numbers (can’t be divisible by 2). Zero is also a number which does not have any sign either positive or negative. Other types of numbers could be as complex numbers, rational and irrational numbers, transcendental numbers ( for example pi), real numbers and prime numbers (3, 1, 7, 11, etc.). Grade IV has some of the basic operations on the number which the pupils of grade IV get normally interacted. So we just use addition, subtraction, multiplication, and division like simple operations on the numbers in this chapter. Talking about positive number, numbers which are greater than zero and also have some magnitude. It always represents an integer. All the integers represent the positive number. All the normal operations in mathematics are applied on the positive numbers. For example 1, 2, 5, 8, 978, 1034, and all integer show the positive number. All the operations are applied on the positive numbers. For example: Addition of positive:  45 + 55 = 100

                                Subtraction         :       978 – 875 = 103

Similarly, multiplication and division can also be performed on positive numbers.

In the term of number line positive number always lie on the right side on the number line. Here zero differentiates the negative and positive numbers on the line.

In upcoming posts we will discuss about Temperature in Grade IV and Mathematics in daily life. Visit our website for information on chemistry syllabus for class 12 Maharashtra board