# NCERT Solutions for Class 8 Maths Chapter 1

NCERT Solutions for Class 8 Maths Chapter 1 Rational Numbers Prashnavali 1.1 and Prashnavali 1.2 in Hindi Medium or Exercise 1.1 or Exercise 1.2 in English Medium free to download in PDF format updated for session 2020-2021.

Download NCERT Solutions 2020-2021 not only for Class 8 Maths but also other classes and other subjects also. Download Class 8 Maths App for offline use or Kaksha 8 Ganit App in Hindi Medium. Join the Discussion Forum to ask the difficult Questions and puzzles in Maths.## NCERT Solutions for Class 8 Maths Chapter 1

Class: | 8 |

Subject: | Maths – गणित |

Chapter 1: | Rational Numbers |

### Class 8 Maths Chapter 1 Solutions

Study online Exercise 1.1 of Rational Numbers class 8 Maths Solutions in English and Hindi Medium here. Click to Exercise 1.1 and Exercise 1.2 in English or प्रश्नावली 1.1 and प्रश्नावली 1.2 in Hindi. Video Format solutions of each exercise are also available to use free.

### 8 Maths Chapter 1 Solutions in English Medium

### 8 Maths Chapter 1 Solutions in Hindi Medium

#### Class 8 Maths Chapter 1 Exercise 1.1 Solutions in Videos

#### Class 8 Maths Chapter 1 Exercise 1.2 Solutions in Videos

#### More about Class 8 Maths Chapter 1

In 8 Maths Chapter 1, we will study about the application of Closer property of addition, subtraction and Multiplication. We also have to go through Commutative and Associative property under addition and multiplication. In all the operations we have to check whether Identity, Inverse exist or not just like additive identity or multiplicative inverse. The applications of distributive property is also be done in this chapter. How can the rational numbers can be represented on a number line and find the rational number between any two given rational numbers as there are countless rational numbers between two numbers. The idea of mean helps us to find rational numbers between two rational numbers.

##### About Preparation

क्रमविनिमेय और साहचर्य नियम विद्यार्थिओं को अन्य पाठों में भी लगाना पड़ेगा अतः इसे अच्छी तरह से सीख लें। विभिन्न परिमेय संख्याओं का योज्य तत्समक और गुणात्मक तत्समक ज्ञात करना भी आना चाहिए। अध्धयन से सम्बंधित किसी भी परेशानी के लिए विद्यार्थी कभी भी संपर्क कर सकते है। इसमें हिचकिचाने के कोई आवश्यकता नहीं है। आपकी मदद ही हमारा उद्देश्य है।

Before starting this chapter, students should know about Natural Numbers, Whole Numbers, Integers (Positive and Negative), etc so that they can understand each and every term properly.

NCERT Solutions for Class 8 other subjects are also available in PDF form. Class 8 Maths Chapter 1 Rational Numbers Sols are given in updated form for 2020-21 to use online as well as download in PDF form. If you face any problem during download, please call us, we will immediately solve the problem.

###### Associative Property of Integers

Operation | Numbers | Remarks |
---|---|---|

Addition | Is (–2) + [3 + (– 4)] = [(–2) + 3)] + (– 4)? Is (– 6) + [(– 4) + (–5)] = [(– 6) +(– 4)] + (–5)? For any three integers a, b and c, we have a + (b + c) = (a + b) + c | Addition is associative |

Subtraction | Is 5 – (7 – 3) = (5 – 7) – 3? No. | Subtraction is not associative |

Multiplication | Is 5 × [(–7) × (– 8) = [5 × (–7)] × (– 8)? Is (– 4) × [(– 8) × (–5)] = [(– 4) × (– 8)] × (–5)? For any three integers a, b and c, we have a × (b × c) = (a × b) × c | Multiplication is associative |

Division | Is [(–10) ÷ 2] ÷ (–5) = (–10) ÷ [2 ÷ (– 5)]? No | Division is not associative |

##### Are the Rational Numbers closed under the operations of Division?

No, the Rational numbers are closed under addition, subtraction and multiplication operations only.

##### Which rational number is additive identity for all rational numbers.

Zero (0) is the additive identity for rational numbers.

##### How many rational numbers are there between two rational numbers?

Between any two given rational numbers there are infinitely many rational numbers.

##### Which rational number is multiplicative identity for all rational numbers.

One (1) is the multiplicative identity for rational numbers.