Class 9 Math| Exercise 2.1| Logarithms| NBF New Book 2025 | Scientific Notation | Standard Notation

This exercise introduces students to the concept of scientific notation and standard form, which are essential tools for expressing very large or very small numbers in a simplified format.

Students learn how:

Extremely large numbers like the speed of light or very small numbers like the size of an atom can be written concisely.

A number is written in scientific notation as the product of a number (between 1 and 10) and a power of 10.
(For example: 3,000 = 3 × 10³)

To convert numbers from standard form to scientific notation and vice versa.

To identify the positive and negative powers of 10, based on the position of the decimal point.

These notations help in making calculations easier and reduce errors, especially in scientific fields like physics, chemistry, and engineering.

By the end of Exercise 2.1, students will be able to:

Understand the structure of scientific notation.

Convert between scientific and standard notations accurately.
00:00 Introduction +concept +Exercise

07:15 Q.1 - Scientific Notation

10:53 Q.2 - Standard Notation

15:55 Q.3 - Converting into the form indicated

24:50 Q.4 - Word Problem in Standard form

30:07 Q.5 - Earth and Sun answer in Standard form

Solve real-life problems involving large or small numbers using powers of 10.

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