(CH 1 ) NUMBER SYSTEMS. Class 9th MATHEMATICS (CH 1 ) NUMBER SYSTEMS. Lesson Content 0% Complete 0/9 Steps 1. 1 INTRODUCTION. 1.2 IRRATIONAL NUMBERS. 1.3 REAL NUMBERS. 1.4 REPRESENTING REAL NUMBERS ON THE NUMBER LINES. 1.5 OPERATIONS ON REAL NUMBERS. 1.6 LAW OF EXPONENTS. 1.7 MULTIPLE CHOICE QUESTIONS. 1.8 SUMMARY. 1.9 TEST YOURSELF: Back to Course Next Lesson admin2020-09-24T04:14:20+00:00