RBSE Class 7 Maths Notes Chapter 13 Exponents and Powers

These comprehensive RBSE Class 7 Maths Notes Chapter 13 Exponents and Powers will give a brief overview of all the concepts.

Rajasthan Board RBSE Solutions for Class 7 Maths in Hindi Medium & English Medium are part of RBSE Solutions for Class 7. Students can also read RBSE Class 7 Maths Important Questions for exam preparation. Students can also go through RBSE Class 7 Maths Notes to understand and remember the concepts easily. Students can access the data handling class 7 extra questions with answers and get deep explanations provided by our experts.

RBSE Class 7 Maths Chapter 13 Notes Exponents and Powers

→ We can write large numbers in a shorter form using exponents. Observe 10,000 = 10 × 10 × 10 × 10 = 104
The short notation 104 stands for the product 10 × 10 × 10 × 10. Here ‘10’ is called the base and ‘4’ the exponent. The number 104 is read as 10 rajsed to the power 4 or simply as fourth power of 10.

→ Very large numbers are difficult to read, understand, compare and operate upon. To make all these easier, we use exponents, converting many of the large numbers in a shorter form.

RBSE Class 7 Maths Notes Chapter 13 Exponents and Powers

→ Numbers in the exponential form obey certain laws, which are :
For any non-zero integers a and b and whole numbers m and n;
(a) am × an = am+n
(b) am ÷ an = am-n, m > n
(c) (am)n = amn
(d) am × bm = (ab)m
(e) am ÷ bn = \left(\frac{a}{b}\right)^{m}
(f) a° = 1
(-1)even number = 1
(-1)odd number = - 1

→ Any number can be expressed as a decimal number between 1.0 and 10.0 including 1.0 multiplied by a power of 10. Such a form of a number is called its standard form or scientific notation.

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Last Updated on May 31, 2022, 5:33 p.m.
Published May 31, 2022