Mathematics is like music – Enjoy it!!!
All Mathemafia YouTube videos of Class 9 chapter 1 (Number System) are embedded on this webpage. You can watch all these videos right here in the same order as they appear in the NCERT textbook. Number system is the base…
Read MoreConcept: Rational and irrational numbers constitute real numbers. Also, the set of rational and irrational numbers are mutually exclusive that means no number can be both rational and irrational. Symbols Q and Q′ (read it as Q-dash or Q-prime) are…
Read MoreConcept: In this tutorial, you will learn about the very important topic – Number system. It is one of the basic concepts of Mathematics that every math student should learn very well. This is foundation of rest of the mathematics…
Read MoreConcept: In this tutorial, you will learn how to prove that integers are infinitely many. The proof is very simple and you will be able to understand it very quickly. Similar method can be applied to prove that Natural numbers,…
Read MoreConcept: In this tutorial, you will learn that there are infinitely many rational numbers between any two rational numbers. There are multiple ways to learn it and I have taught by calculating the mean (average) of two numbers. Rational numbers…
Read MoreConcept: In this tutorial, you will learn how to prove that rational numbers are infinitely many. The proof is very simple and you will be able to understand it very quickly. Similar method can be applied to prove that Natural…
Read MoreConcept: In this tutorial, you will learn to find a rational number between any two rational numbers by calculating the mean of the two numbers. It is quite simple method. There are more ways to find it, however, this is…
Read MoreConcept: In this tutorial, you will learn about the commutative property (commutative law) and its applicability on different arithmetic operations. You will learn that addition and multiplication hold the commutative property where as subtraction and division does not. Identity, Inverse…
Read MoreConcept: In this tutorial, you will learn the following: Additive Identity (0) Multiplicative identity (1) Additive inverse (-x) Reciprocal or Multiplicative Inverse (1/x where is not equal to zero) Closure property – Rational Numbers Commutative Law
Read MoreConcept: In this tutorial, you will learn about the closure property. It is discussed in detail for the following operations on rational numbers. Addition Subtraction Multiplication Division Closure property – Whole Numbers & Integers Identity & Inverse
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