Revision Notes for CBSE Class 8 Maths Chapter 7 - Free PDF Download
CBSE Class 8 Maths Chapter 7 Cubes and Cube Roots is an essential part of this syllabus that students need to focus on. This chapter explains what a cube and cube root is and how to identify them by using the various methods explained. To make it easier, download and study the revision notes designed by the subject experts of Vedantu and find out the easier explanation to grab. Check how the experts have explained these concepts and escalate your preparation level.
If you are looking for the best revision notes for Class 8 maths Chapter 7, then Vedantu’s cubes and cube roots Class 8 notes are prime quick. These revision notes will help you to understand the concepts in a better way. These revision notes will not only help you to prepare for your school examination but also it will help you to prepare for other competitive exams like the Olympiad. CBSE Class 7 students are advised to refer and understand Cubes and Cube Root Class 8 Notes provided by Vedantu as it covers the entire chapter in a short and precise way. It also includes a set of examples that will build a strong foundation of the important concepts.
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You can also download NCERT Solutions Class 8 Maths to help you to revise the complete syllabus and score more marks in your examinations.
FAQs on Cubes and Cube Roots Class 8 Notes CBSE Maths Chapter 7 [Free PDF Download]
1. What are cube numbers according to Revision Notes of Chapter 7 of Class 8 Maths?
The numbers which are obtained by multiplying themselves three times are called cube numbers. For example, 2 multiplied by itself three times gives 8 hence 8 is the cube of 2. When doing prime factorization of a cube number if a prime factor repeats itself 3 times then that number is called a perfect cube. There are only ten perfect cubes among 1-1000. The concept of cube numbers is important and students should practice the questions of this chapter thoroughly.
2. What are cube roots as described in Revision Notes of Chapter 7 of Class 8 Maths?
Cube roots of a number are the numbers which when multiplied by themselves give the cube of a number. The cube root of a number, for example, 8 is denoted by 38. Memorising cube roots of some commonly used numbers can help students in quicker calculations.
3. How do you find the cube root of a number?
The cube root of a number can be found out by the prime factorization method.
To find the cube root of a number follow these steps-
For example, if you want to find the cube root of 8000,
8000 = 2222225 55
225= 20is the cube root of 8000.
Prime factorization can be used to find the cube root when we do not know whether a number is a cube or not.
4. How many exercises are there in NCERT Chapter 7 of Class 8 Maths?
There are two exercises in the Chapter 7 of NCERT Class 8 Maths textbook:
Exercise 7.1- four questions
Exercise 7.1 tests the students' understanding of perfect cubes and how to find them.
Exercise 7.2- three questions
In this exercise, students will learn how to find the cube root of a number using the prime factorization method.
They will also solve problems of finding the cube root of a number using the estimation method.
5. What are the main topics in NCERT Chapter 7 of Class 8 Maths?
The Chapter 7 of NCERT Class 8 Maths textbook teaches students the concept of cube numbers and cube roots. Students will learn what are cube numbers and when are the cube numbers called perfect cubes. They will also learn the concept of cube roots. The important topic in this chapter is the methods of finding cube roots of a number using the prime factorization method. Another method that can be used is the estimation method for the numbers that are already known to be cube numbers. The students can get the solutions and notes on Vedantu website and Vedantu Mobile app for free.