NCERT Solutions Class 8 Maths Chapter 12 Exercise 12.2
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Mathematics is a subject that requires constant practice. Students are expected not only to practise questions and problems provided as a part of their prescribed NCERT textbooks for Mathematics. They are also strongly recommended that they seek out other sources like past years’ papers, meticulously crafted sample question papers, and other kinds of welldesigned practise assessments. Practising with the aid of a wide variety of academic resources would have an evident positive effect on the academic performance of students. It would also give them the advantage of familiarising themselves with the pattern of questions which could appear in the examinations. Once they have mastered this level of reading comprehension, they will be able to determine the best course of action to take when faced with specific types of problems.The system of examinations that is prevalent in the national education system established, regulated, and monitored by the NCERT is a thorough and complex one.
Class 8 is a very important academic year in a student’s life. Various new concepts are introduced to students in Class 8. The difficulty level also rises when students move from Class 7 to Class 8. Therefore, students need to prepare more and put more effort into their academics. The various concepts that students learn in Class 8 are very useful in higher education. The concepts learnt in Class 8 act as foundations for higher classes. The difficulty level of Class 8 Mathematics also increases, and students therefore sometimes find Mathematics to be a difficult subject. To make solving Mathematics questions easy, students must practise a lot of questions. They should solve all the NCERT exercise questions from all chapters of Class 8 Mathematics.
Students usually view Mathematics as difficult. Students must practise a significant number of questions in order to make Mathematics easy and simple to learn. Furthermore, consistency is necessary in Mathematics for optimal understanding. To be completely prepared for Mathematics exams, students must solve questions of varying complexity levels. Students should begin the chapter by answering simple questions and gradually progress to questions that demand students to use reasoning and analytical abilities. In exams, students may frequently encounter questions requiring analytical abilities, thus, students must be prepared for all types of questions. With enough practice, students will be able to answer questions quickly and within the time limit.
Mathematics is a subject that all students must study. Learning Mathematics is fascinating since it introduces students to new concepts and their applications. It also enhances their cognitive and reasoning abilities. Mathematics practise can help students develop their critical thinking skills. Mathematics is a significant tool for developing mental discipline. Mathematics has several applications. In some way or another, Mathematics is used in everyday life. As a result, Mathematics is introduced to students at an early age.
Chapter 12 of Class 8 Mathematics is on Exponents and Powers. In this chapter, students learn about how to write large numbers more easily using Exponents and Powers, how to express numbers in standard form, how to deal with Negative Exponents, numerous laws related to Exponents and much more. To study this chapter effectively, students can take help from the resources offered by Extramarks. To find the most accurate solutions for Exercise 12.2, students can use the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2. The NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 are available to download from the website and mobile application of Extramarks. The NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 can be downloaded in PDF format by students. Students who find the questions from Class 8 Maths Chapter 12 Exercise 12.2 to be tough can easily solve them with the help of NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2.
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers (EX 12.2) Exercise 12.2
To excel in Mathematics, students must practise a lot of questions. Students can practise the questions of Class 8 Chapter 12 from the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2. The NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 are offered by Extramarks for the benefit of students. Students can download the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 from the website and mobile application of Extramarks. The NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 can be downloaded in PDF format for easy access. With the help of these solutions, students can gain a thorough understanding of Class 8 Maths Chapter 12 Exercise 12.2.
With the help of the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 students will be able to solve the NCERT Class 8 Maths Chapter 12 Exercise 12.1 thoroughly. The NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 are written in a stepwise manner for the conceptual clarity of students. The NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 can help students with selfstudy and enhance their Mathematics skills.
Access NCERT Solution for Class 8 Maths Chapter 12 Exponents and Powers
With the help of the links provided, students can access the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 and better understand it.. Students are advised to download the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 in PDF format. The NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 will help students score well in their Mathematics exams. Students must download the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 to write the most precise solutions for Class 8 Maths Exercise 12.1.
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Exercise 12.2
In Chapter 12 of Class 8 Mathematics, there are two exercises. Both exercises must be solved by students. The Class 8 Maths Exercise 12.2 Solution is offered by Extramarks. The NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 can be downloaded from the website and mobile application of Extramarks. The NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 are written by expert Mathematics teachers for the benefit of students. With the help of the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 students will be able to solve all questions easily.
NCERT Solutions for Class 8
Students in class 8 study a wide range of topics. Mathematics, Social Science, Science, Sanskrit/Hindi, and English are the key subjects of Class 8. Students must properly study all of the subjects since they are all significant. Students can prepare for these subjects by using Extramarks’ resources. Extramarks provides students with past year’s papers, solutions, NCERT solutions, and revision notes to help them prepare for their Class 8 exams.Students must use the materials available to score higher in their Class 8 examination. Extramarks’ materials are quite beneficial for selfstudying. Extramarks’ materials can be trusted by students. All materials are curated by subjectmatter experts and proofread on a regular basis. Furthermore, the study materials are frequently updated according to the most recent CBSE guidelines.
Students must thoroughly prepare for Class 8. Comprehensive preparation for Class 8 will guarantee that students understand the fundamental themes of the major subjects. Students who are wellversed in the subjects of Class 8will be able to study more effectively in higher classes. In Class 8, students must complete all of the practise questions as well as the supplementary activities outlined in the NCERT textbooks. Students will get a practical understanding of subjects in this manner. If students face any challenges, they can use the various study resources offered by Extramarks. Here are a few pointers to help students prepare for Class 8:
 To improve their test scores, students should solve past years’ papers and sample papers on a regular basis. Solving CBSE example problems for Class 8 may help students prepare for their exams, as some of the questions in the sample papers may appear on the final exam question paper. These mock exams assist students in evaluating their own preparation. After completing a chapter, students are also encouraged to take unit tests. They should attempt answering questions to see how well they understand the chapter. Unit exams must be analysed in order to identify weak areas that students may then improve on. Extramarks offers solutions for past years’ papers and their solutions for the benefit of students. Students must make use of the resources offered by Extramarks.
 The most crucial element of exam preparation is revision. Students benefit from revision since it allows them to retain a significant amount of information for a longer duration of time. With sufficient revision, students should be able to recall most of the formulas from their Class 8 Mathematics textbooks. Revisions should be done on a frequent basis. Students should go through their short notes, mock tests, and unit tests. Students will develop confidence after multiple readings. Regularly practising questions is the most efficient technique to revise Mathematics. Regular practise of questions will reduce the amount of time it takes to solve each question, allowing them to finish their papers on time. To revise Class 8 topics, students can download the revision notes provided by Extramarks. The revision notes offered by Extramarks cover the whole syllabus holistically, so students do not have to worry about missing out on any of the important topics. Students can download all the resources provided by Extramarks from their website and mobile application.
 The most important study resource for Class 8 school examinations is NCERT questions. NCERT questions provide enough practise questions for students to prepare for the exams. Moreover, after solving the NCERT exercises students get an insight into the types of questions that can appear in the exams. NCERT exercises, offer questions of varying levels of difficulty. Students must practise the NCERT questions since questions in the CBSE exams and School term end exams are usually very similar to the NCERT exercises. Frequently, questions are directly derived from NCERT exercises.. If students face any challenges while solving the NCERT Exercises or if they want to find the most accurate solutions, they can use the study materials offered by Extramarks. Extramarks’ materials are reliable and trustworthy. NCERT practise questions can also help students prepare for competitive examinations. To solve questions of Exercise 12.2 of Chapter 12, students can take help from the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2. The NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 can be downloaded from the website and mobile application of Extramarks. Students are advised to download the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 in PDF format.
 Students are more likely to complete topics on time when they have a strategy and deadlines. Higher weightage and more difficult subjectsmay demand additional study time. As a result, students must set aside time for different topics and chapters. Many students find mathematics difficult, therefore, they should commit more time to practising Mathematics questions. Students from Class 8 should focus on the important chapters of Mathematics and create weekly and monthly targets for themselves. This will allow them to monitor their progress and ensure that they complete the full course. To make their preparation easy, students can take help from the study resources offered by Extramarks. The resources provided by Extramarks are authentic and reliable.
Q.1 Express the following numbers in standard form.
(i) 0.0000000000085 (ii) 0.00000000000942
(iii) 6020000000000000 (iv) 0.00000000837
(v) 31860000000
Ans
The standard form of a number is
$\begin{array}{l}\mathrm{N}\times {10}^{\mathrm{power}},\text{where N is number greater than or}\\ \text{equal to 1 but less than 10.}\end{array}$
$\begin{array}{l}\left(\text{i}\right)\text{The standard form of}0.00000000000\text{85}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}=\text{8}.\text{5}\times \text{1}{0}^{\text{12}}\\ \left(\text{ii}\right)\text{The standard form of}0.00000000000\text{942}\text{\hspace{0.17em}}\text{\hspace{0.17em}}=\text{9}.\text{42}\times \text{1}{0}^{\text{12}}\\ \left(\text{iii}\right)\text{The standard form of 6}0\text{2}0000000000000=\text{6}.0\text{2}\times \text{1}{0}^{\text{15}}\\ \left(\text{iv}\right)\text{The standard form of}0.00000000\text{837}\text{\hspace{0.17em}}\text{\hspace{0.17em}}=\text{8}.\text{37}\times \text{1}{0}^{\text{9}}\\ \left(\text{v}\right)\text{The standard form of 3186}0000000\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}=\text{3}.\text{186}\times \text{1}{0}^{\text{1}0}\end{array}$
Q.2 Express the following numbers in usual form.
(i) 3.02 × 10^{– 6} (ii) 4.5 × 10^{4} (iii) 3 × 10^{– 8}
(iv) 1.0001 × 10^{9} (v) 5.8 × 10^{12} (vi) 3.61492 × 10^{6}
Ans
$\begin{array}{l}\left(\text{i}\right)\text{3}.0\text{2}\times \text{1}{0}^{\text{6}}=\frac{3.02}{{10}^{6}}=\frac{302\times {10}^{2}}{1000000}=\text{}0.00000302\\ \left(\mathrm{ii}\right)\text{}4.5\text{}\times \text{}{10}^{4}=\text{}4.5\times 10000=45000\\ \left(\mathrm{iii}\right)\text{}3\text{}\times \text{}{10}^{8}=\text{}\frac{3}{{10}^{8}}=0.00000003\end{array}$
$\begin{array}{l}\left(\mathrm{iv}\right)\text{}1.0001\text{}\times \text{}{10}^{9}=\text{}1000100000\\ \left(\mathrm{v}\right)\text{}5.8\text{}\times \text{}{10}^{12}=\text{}5800000000000\\ \left(\mathrm{vi}\right)3.61492\text{}\times \text{}{10}^{6}=\text{}3614920\end{array}$
Q.3 Express the number appearing in the following statements in standard form.
(i) 1 micron is equal to 1/1000000 m.
(ii) Charge of an electron is 0.000,000,000,000,000,000,16 coulomb.
(iii) Size of a bacteria is 0.0000005 m
(iv) Size of a plant cell is 0.00001275 m
(v) Thickness of a thick paper is 0.07 mm
Ans
The standard form the numbers are as follows:
$\begin{array}{l}\left(\text{i}\right)\frac{1}{1000000}=\frac{1}{{10}^{6}}=\text{}1\text{}\times \text{}{10}^{6}\\ \left(\mathrm{ii}\right)\text{}0.000,000,000,000,000,000,16=\frac{1.6\text{}\times \text{}10}{{10}^{20}}=1.6\text{}\times \text{}{10}^{19}\\ \left(\mathrm{iii}\right)\text{}0.0000005\text{}=\frac{5}{10000000}=\frac{5}{{10}^{7}}=\text{}5\text{}\times \text{}{10}^{7}\\ \left(\mathrm{iv}\right)\text{}0.00001275\text{}=\frac{1.275\times {10}^{3}}{{10}^{8}}=\text{}1.275\text{}\times \text{}{10}^{5}\\ \left(\mathrm{v}\right)\text{}0.07\text{}=\frac{7}{100}=\text{}7\text{}\times \text{}{10}^{2}\end{array}$
Q.4 In a stack there are 5 books each of thickness 20mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the stack?
Ans
\begin{array}{l}\text{Thickness of each book}=\text{2}0\text{mm}\\ \text{Hence},\text{thickness of 5 books}=\left(\text{5}\times \text{2}0\right)\text{mm}=\text{1}00\text{mm}\\ \text{Thickness of each paper sheet}=0.0\text{16 mm}\\ \text{Hence},\text{thickness of 5 paper sheets}=\left(\text{5}\times \text{}0.0\text{16}\right)\text{mm}=0.0\text{8}0\text{mm}\\ \text{Total thickness of the stack}=\text{Thickness of 5 books}+\text{Thickness of}\\ \text{5 paper sheets}\\ =\text{}\left(\text{1}00+0.0\text{8}0\right)\text{mm}=\text{1}00.0\text{8 mm}=\text{1}.000\text{8}\times \text{1}{0}^{\text{2}}\text{mm}\end{array}
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FAQs (Frequently Asked Questions)
1. Are Class 8 Mathematics concepts tough to understand?
It is true that Class 8 has an increased difficulty level in all subjects but students can make it easier for themselves by studying regularly and practising NCERT exercises. Class 8 Mathematics must also be prepared in this manner. Students can solve NCERT exercises with the help of resources provided by Extramarks. To solve the questions of Chapter 12 Class 8, students can take the help of the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2.
2. From where can students download the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2?
Students can download the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 from the website and mobile application of Extramarks.
3. Can the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 be downloaded in PDF format?
Yes, the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 are available in PDF format. Students are advised to download the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 in PDF format for easy access.
4. Will the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 help students to solve mock papers?
Yes, the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 will help students in solving the mock examination questions. They can also refer to Extramarks’ past years’ paper solutions to find authentic solutions. Students must download the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 for preparing Chapter 12 efficiently.
5. Are solutions of other Chapter 6 Exercises also provided by Extramarks?
Yes, along with the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2, solutions for Exercise 12.1 are also available on the website and mobile application of Extramarks for the benefit of students. Students can refer to the solutions in case of any challenges.
6. Are the NCERT Solutions For Class 8 Maths Chapter 12 Exercise 12.2 also provided in Hindi by Extramarks?
Extramarks does provide study materials in Hindi for students. They can visit the website and mobile application to download the study material in Hindi.