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What is 10 - 2?
Grade Level:
Class 1
Maths, Computing, AI
Definition
What is it?
10 - 2 means taking away 2 from 10. It is a basic subtraction problem. Subtraction is finding the difference between two numbers.
Simple Example
Quick Example
Imagine you have 10 laddoos. If you eat 2 laddoos, how many are left? You started with 10, took away 2, so you need to find the remaining number.
Worked Example
Step-by-Step
Let's find 10 - 2:
1. Start with the first number, which is 10.
2. We need to subtract, or take away, the second number, which is 2.
3. You can count backwards from 10, two times: 10, then 9 (one step), then 8 (second step).
4. So, after taking 2 away from 10, you are left with 8.
Answer: 8
Why It Matters
Understanding subtraction is crucial for everyday life and future studies. In computing, it's used in programming to calculate changes in values. In AI, it helps systems compare data. This basic skill is foundational for careers in software development, data analysis, and even rocket science at ISRO!
Common Mistakes
MISTAKE: Adding the numbers instead of subtracting (e.g., 10 + 2 = 12) | CORRECTION: Remember the minus sign (-) means 'take away' or 'subtract'.
MISTAKE: Counting only one number back (e.g., from 10, counting back to 9 and stopping) | CORRECTION: Count back the exact number of steps indicated by the second number (in this case, two steps).
MISTAKE: Getting confused if the numbers are large | CORRECTION: Use methods like counting on fingers, drawing lines, or counting backwards mentally to break down the problem.
Practice Questions
Try It Yourself
QUESTION: You have 10 rupees. You buy a pen for 2 rupees. How much money do you have left? | ANSWER: 8 rupees
QUESTION: A bus has 10 seats. If 2 seats are empty, how many people are sitting in the bus? | ANSWER: 8 people
QUESTION: Rahul scored 10 runs in his first cricket match. In his second match, he scored 2 runs less than his first match. How many runs did he score in the second match? | ANSWER: 8 runs
MCQ
Quick Quiz
What is the result of 10 minus 2?
12
8
10
2
The Correct Answer Is:
B
10 minus 2 means taking 2 away from 10. Counting back two steps from 10 gives 9, then 8. So, 8 is the correct answer.
Real World Connection
In the Real World
When you check your mobile data balance, and it shows 10 GB, but you use 2 GB to watch videos, your phone's system performs this exact subtraction (10 - 2) to show you that 8 GB is left. This is how apps like Google Pay or UPI also calculate remaining balances after a transaction.
Key Vocabulary
Key Terms
SUBTRACTION: The process of taking one number away from another | DIFFERENCE: The result of subtracting one number from another | MINUS: A symbol (-) used to show subtraction | TAKE AWAY: To remove a quantity from a group
What's Next
What to Learn Next
Great job understanding basic subtraction! Next, you can learn about 'What is 10 + 2?', which is addition. This will help you understand how numbers combine and grow, building on your skills for solving more complex problems.
