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Formula Sheet

International Number System — Formula Sheet

ICSE · Class 5 · Mathematics

8 formulas from International Number System (ICSE Class 5 Mathematics) on one page, grouped by topic. Part of the ICSE Class 5 Mathematics syllabus.

41 questions25 flashcards8 formulas & key relations3 concepts

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8 Entries · 4 Sections

Formulas and Key Relations

Number Names and Conversions

1 Lakh = 100,000

1 Million = 10 Lakhs = 1,000,000

1 Billion = 1,000 Million = 1,000,000,000

Writing and Reading Numbers

Insert commas every 3 digits from right

Converting Between Indian and International Systems

1 Lakh = 100,000 = One Hundred Thousand

10 Lakh = 1,000,000 = 1 Million

1 Crore = 10,000,000 = 10 Million

1 Million = 10 Lakh, 1 Billion = 100 Crore.

Full sheet with units and worked examples

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Frequently Asked Questions

What are the important topics in International Number System for ICSE Class 5 Mathematics?
Key topics in International Number System include Understanding the International Number System, Place Value Chart - International System, Converting Between Indian and International Systems. Study these first, then practise questions on each for Class 5 exams.
How many formulas are in International Number System?
This sheet lists 8 formulas from International Number System, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise International Number System for Class 5 exams?
Learn the core ideas first, then work through the 41 practice questions on International Number System. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for International Number System

All ICSE Class 5 Mathematics Formula Sheet

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