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Syllabus

Addition — Syllabus

ICSE · Class 3 · Mathematics

What Addition covers in ICSE Class 3 Mathematics: 4 topics, for the 2026-27 session. Part of the ICSE Class 3 Mathematics syllabus.

40 questions30 flashcards5 formulas & key relations4 concepts

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4 Topics · ICSE Class 3 Mathematics · 2026-27

Topics in Addition

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.

Key Concepts

Central concept: Addition

Addition Without Carry OverAddition With Carry OverAdding Numbers of Different DigitsAdding Three or More NumbersEstimation in AdditionWord Problems on AdditionAddition of Five-Digit Numbers

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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 Syllabus

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