Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

Class 8 Mathematics by VP Classes

Created by: Vp Classes

Class 8 : Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

The document Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev is a part of the Class 8 Course Class 8 Mathematics by VP Classes.
All you need of Class 8 at this link: Class 8

Question 1: Multiply the reciprocal of (7/8) by the reciprocal of (-2/21)
Solution: Given two rational numbers 7/8 and -2/21

We know,
Reciprocal of (-2/21) is (-21/2)
Reciprocal of (7/8) is (8/7)
Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev
Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

Question 2: The product of two rational numbers is (-28/75). If one of the numbers is (14/25), find the other.
Solution: 
Product of two numbers = -28/75
Any one of the rational numbers = 14/25
Let the other number be R
∴ R х 14/25 = -28/75
The other number 
Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev
Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev
Thus, the required rational number is (-2/3)

Question 3: Find three rational numbers between –3 and –4.
Solution: By formula method,

a = -3 and b = -4
Therefore, the rational number b/w -3 and -4 is

Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev
A rational number between (–3) and (-7/2)

Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

A rational number between (-7/2) and (-4)
Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev
Thus, the three rational numbers between (–3) and (–4) are -7/2, -13/4, -15/4.

Question 4: Find three rational numbers between (1/2) and (–2)
Solution: By formula method, 

a = 1/2 and b = -2
A rational number between  (1/2) and (–2)

Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

 A rational number between 1/2 and (-3/4)

Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

A rational number between (-3/4) and (–2)

Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

Thus, the three rational numbers between 1/2 and -2 are -3/4, -1/8, -11/8.

Complete Syllabus of Class 8

Dynamic Test

Content Category

Related Searches

pdf

,

Important questions

,

ppt

,

Objective type Questions

,

Viva Questions

,

Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

,

shortcuts and tricks

,

practice quizzes

,

MCQs

,

past year papers

,

Previous Year Questions with Solutions

,

Extra Questions

,

Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

,

Semester Notes

,

Free

,

Sample Paper

,

study material

,

video lectures

,

Exam

,

mock tests for examination

,

Summary

,

Extra Questions and Practice Exercise- Rational Numbers Class 8 Notes | EduRev

;