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Revision Notes

Addition — Revision Notes

ICSE · Class 3 · Mathematics

Addition revision notes for ICSE Class 3 Mathematics: 4 topics in quick points. Part of the ICSE Class 3 Mathematics syllabus.

40 questions30 flashcards5 formulas & key relations4 concepts

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Key Topics to Revise

1

1. Addition Without Carry Over

  • When the sum of digits in any column is less than 10, we write the answer directly.
  • No carry over is needed.
  • Always start adding from the 'Ones' place.
2

2. Addition With Carry Over

  • When the sum of digits in a column is 10 or more, we carry over the extra digit to the next higher place.
  • Carry over means moving the extra ten(s) to the next column.
  • Example: 8 + 7 = 15 → Write 5, carry over 1 ten.
3

3. Adding 3-digit and 4-digit Numbers

  • 4-digit numbers have Thousands (Th), Hundreds (H), Tens (T), and Ones (O).
  • 3-digit numbers only have H, T, O — so we treat the Thousands as 0.
  • Always align numbers by place value.
4

4. Adding Three or More Numbers

  • We can add three or more numbers using the same column method.
  • Add column by column, starting from Ones.
  • Carry over as needed.

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Full Notes

Key Concepts

When the sum of digitsWhen the sum of digitsWe follow the same columnWe round off numbers to

Frequently Asked Questions

What are the important topics in Addition for ICSE Class 3 Mathematics?
Key topics in Addition include Addition Without Carry Over, Addition With Carry Over, Adding 3-digit and 4-digit Numbers, Adding Three or More Numbers. Study these first, then practise questions on each for Class 3 exams.
How should I revise Addition for Class 3 exams?
Learn the core ideas first, then work through the 40 practice questions on Addition. 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.

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All ICSE Class 3 Mathematics Revision Notes

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