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Chapter 6 of 13
Revision Notes

Subtraction — Revision Notes

ICSE · Class 1 · Mathematics

Subtraction revision notes for ICSE Class 1 Mathematics: 3 topics in quick points. Part of the ICSE Class 1 Mathematics syllabus.

133 questions25 flashcards2 formulas & key relations4 concepts

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Key Topics to Revise

1

What is Subtraction?

  • Subtraction means taking away or removing things from a group.
  • We use the symbol '−' (minus) for subtraction.
  • The answer in subtraction is called the difference.
2

Methods of Subtraction

  • We can subtract by counting backward from the starting number.
  • We can use pictures or objects to cross out and count what is left.
  • For two-digit numbers, we subtract ones first, then tens.
3

Types of Subtraction Problems

  • Subtracting 1-digit numbers from 1-digit numbers (e.g., 8 − 3).
  • Subtracting 1-digit numbers from 2-digit numbers without borrowing (e.g., 45 − 2).
  • Subtracting 1-digit numbers from 2-digit numbers with borrowing (e.g., 32 − 7).

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Full Notes

Key Concepts

Subtraction is taking away some itemsTo subtractWhen the top number in eachWhen the top number is smaller

Frequently Asked Questions

What are the important topics in Subtraction for ICSE Class 1 Mathematics?
Key topics in Subtraction include What is Subtraction?, Methods of Subtraction, Types of Subtraction Problems. Study these first, then practise questions on each for Class 1 exams.
How should I revise Subtraction for Class 1 exams?
Learn the core ideas first, then work through the 133 practice questions on Subtraction. 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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