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Revision Notes

Addition

ICSE · Class 3 · Mathematics

Quick revision notes for Addition — ICSE Class 3 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

40 questions30 flashcards4 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 – Chapter Overview Mind Map, Mind map showing all major topics covered in the Addition chapter, Diagram showing how each digit in a number represents a different place value. These are the concepts ICSE Class 3 examiners draw on most — study them first, then practise related questions.
How to score full marks in Addition — ICSE Class 3 Mathematics?
Understand the core concepts first, then work through the 40 practice questions available for this chapter. Revise formulas and 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 11 chapters — ICSE Class 3 Mathematics Revision Notes

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