Class 9 NCERT • Ganita Manjari Part I (New Syllabus)
Ch 03: The World of Numbers
Select a topic or study module below to explore the dawn of counting, natural numbers, integers and Brahmagupta’s rules, rational numbers, number line plots, surds and irrational roots, decimal expansions, and textbook exercises.
Topic 01 • Dawn of Counting & History
Exploring Tally Marks, Lebombo/Ishango Bones, Ancient Indian Numerals, and Powers of 10
Topic 02 • Natural Numbers
Examining Properties of Natural Numbers, Prime Numbers, Base Systems, and Arithmetic Closure
Topic 03 • Integers & Brahmagupta
Understanding Negative Integers, Debts, Fortunes, and Brahmagupta’s Rules for Operations
Topic 04 • Rational Numbers
Analyzing Fractions, Proportions, Equivalence, and Historical Trading Contexts Like Lothal
Topic 05 • Number Line Plots
Plotting Fractions, Mixed Numbers, and Locating Rational Numbers on Single Number Lines
Topic 06 • Rational Arithmetic
Performing Additions, Subtractions, Multiplications, and Finding Numbers Between Pairs
Topic 07 • Real Numbers & Surds
Exploring Irrational Numbers, Roots Like √2 and √3, and the Square Root Spiral
Module 08 • Exercises & Quiz