Class 1 Maths - ICSE
Subtraction
The Class 1 ICSE Subtraction chapter introduces young learners to the concept of taking away objects from a given group. Students learn to find 'how many are left' using physical objects, pictures, and numbers up to 20. The chapter covers horizontal and vertical subtraction, the minus sign, and subtraction with zero. Mastering this foundational chapter is crucial for ICSE board exams as it builds the bedrock for advanced arithmetic, word problems, and multi-digit calculations in later grades. Scoring well here boosts a child's confidence in mathematical logic.
Start Learning FreeKey Concepts
Concept of Taking Away
Subtraction means removing or taking away a smaller number of items from a bigger group to find what is left.
The Minus Sign (-)
The minus sign is the special symbol used to show subtraction between numbers.
The Equals Sign (=)
The equals sign shows the final answer or what is left after we subtract.
Subtracting Zero
When you subtract zero from any number, the number stays exactly the same because nothing is taken away.
Subtracting a Number from Itself
When you subtract a number from itself, the answer is always zero because everything is taken away.
Important Formulas
Board Exam Info
In ICSE Class 1 Mathematics assessments, the Subtraction chapter typically carries around 10 to 15 marks. Common question types include picture-based cross-out problems, vertical subtraction sums, fill-in-the-blanks with zero, and simple one-step word problems.
Frequently Asked Questions
Why is the answer smaller when we subtract?
Because subtraction means taking things away, so the total amount decreases.
What is the difference between addition and subtraction?
Addition means putting things together to make a bigger number, while subtraction means taking things away to make a smaller number.
How do I solve word problems in subtraction?
Look for keywords like 'left', 'took away', or 'remains', then subtract the smaller number from the bigger number.
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