What is Subtracting from 10?

S0-SA1-0320

Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

Subtracting from 10 means taking a smaller number away from the number 10 to find out what is left. It helps us understand how numbers relate to 10 and how to find missing parts of 10.

Simple Example

Quick Example

Imagine you have 10 ladoos for a festival. If you eat 3 ladoos, how many are left? This is subtracting 3 from 10. You started with 10, took away 3, and now you have 7 ladoos left.

Worked Example

Step-by-Step

Let's find out what 10 - 4 is.
1. Start with 10 items. Imagine 10 cricket balls.
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2. We need to subtract 4, which means taking away 4 cricket balls.
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3. Count out 4 cricket balls and remove them from the group of 10.
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4. Now, count the remaining cricket balls.
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5. You will find 6 cricket balls left.
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So, 10 - 4 = 6.

Why It Matters

Understanding subtraction from 10 is a basic building block for all math operations. It's crucial for managing money, calculating scores in games like kabaddi, and even for engineers designing structures or doctors calculating medicine dosages.

Common Mistakes

MISTAKE: Counting up instead of counting down from 10. For example, for 10 - 7, counting 1, 2, 3, 4, 5, 6, 7 and then saying 7 is the answer. | CORRECTION: Start at 10 and count backwards the number you are subtracting. For 10 - 7, say 10, then 9 (1st), 8 (2nd), 7 (3rd), 6 (4th), 5 (5th), 4 (6th), 3 (7th). The answer is 3.

MISTAKE: Confusing subtraction with addition. For example, for 10 - 2, adding 10 + 2 to get 12. | CORRECTION: Remember subtraction means 'taking away' or 'finding the difference'. Addition means 'putting together'. The minus sign (-) means subtract.

MISTAKE: Not understanding that the number being subtracted must be less than or equal to 10. For example, trying to do 10 - 12. | CORRECTION: For now, always subtract a smaller number from 10. You can't take 12 mangoes if you only have 10!

Practice Questions

Try It Yourself

QUESTION: You have 10 rupees. You buy a small packet of biscuits for 5 rupees. How much money is left? | ANSWER: 5 rupees

QUESTION: What is 10 - 8? | ANSWER: 2

QUESTION: Your friend has 10 stickers. If he gives you 3 stickers, and then gives his sister 2 stickers, how many stickers does he have left? | ANSWER: 5 stickers

MCQ

Quick Quiz

If you have 10 pencils and you lose 6 of them, how many pencils do you have left?

The Correct Answer Is:

When you subtract 6 from 10, you are taking 6 away from 10. Counting backwards from 10 six times gives you 4. So, 10 - 6 = 4.

Real World Connection

In the Real World

When you are shopping at a local kirana store and pay with a 10-rupee note, the shopkeeper subtracts the item's price from 10 to give you the correct change. Or, when playing Ludo, you subtract the number of steps your token has already moved from the total steps to reach home.

Key Vocabulary

Key Terms

SUBTRACT: To take one number away from another | DIFFERENCE: The result of subtracting one number from another | MINUS SIGN (-): The symbol used for subtraction | REMAINDER: What is left after subtracting

What's Next

What to Learn Next

Great job mastering subtraction from 10! Next, you can learn about 'Subtracting from Larger Numbers' or 'Subtracting Two-Digit Numbers'. These concepts build on what you've learned here, making bigger calculations easy!