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What is 8 - 2?
Grade Level:
Class 1
Maths, Computing, AI
Definition
What is it?
8 - 2 is a basic subtraction problem. Subtraction means taking away a certain number from another number. Here, you are taking 2 away from 8.
Simple Example
Quick Example
Imagine you have 8 ladoos for a festival. You eat 2 of them. How many ladoos are left? You would do 8 - 2 to find out.
Worked Example
Step-by-Step
Let's find the answer to 8 - 2:
1. Start with the first number, which is 8.
2. Imagine you have 8 objects, like 8 pencils.
3. The second number is 2, and the minus sign means 'take away'. So, you need to take away 2 pencils.
4. Count back 2 steps from 8: 8... (take away 1) is 7... (take away 1 more) is 6.
5. You are left with 6 pencils.
--- The answer is 6.
Why It Matters
Understanding basic subtraction like 8 - 2 is super important for Maths, Computing, and even AI. It's the foundation for solving bigger problems. Engineers use it to calculate material needs, and computer programmers use it in coding to manage data or game scores.
Common Mistakes
MISTAKE: Adding the numbers instead of subtracting (8 + 2 = 10) | CORRECTION: Always check the operation sign. The '-' sign means 'take away' or 'subtract'.
MISTAKE: Counting forward from the smaller number (e.g., 2, 3, 4, 5, 6, 7, 8, which is 6 steps) | CORRECTION: Start with the larger number and count backwards the number of steps indicated by the smaller number.
MISTAKE: Confusing the order (doing 2 - 8 instead of 8 - 2) | CORRECTION: For basic subtraction, always subtract the second number from the first number given.
Practice Questions
Try It Yourself
QUESTION: You have 7 crayons and give 3 to your friend. How many do you have left? | ANSWER: 4
QUESTION: A bus has 9 seats. If 4 seats are empty, how many passengers are there? | ANSWER: 5
QUESTION: There are 10 birds on a tree. 3 fly away, and then 2 more fly away. How many birds are left on the tree? | ANSWER: 5
MCQ
Quick Quiz
What is the result of 8 minus 2?
10
6
5
8
The Correct Answer Is:
B
8 minus 2 means taking 2 away from 8. If you count back 2 from 8, you get 7, then 6. So, 6 is the correct answer.
Real World Connection
In the Real World
When you're shopping at the local kirana store and buy something for 20 rupees, but you give the shopkeeper 50 rupees, they calculate your change using subtraction. They do 50 - 20 to give you 30 rupees back. Similarly, your mobile data balance reduces by subtraction every time you use it.
Key Vocabulary
Key Terms
SUBTRACTION: Taking one number away from another | MINUS SIGN (-): The symbol for subtraction | DIFFERENCE: The answer to a subtraction problem | TAKE AWAY: Another way to say subtract
What's Next
What to Learn Next
Great job understanding 8 - 2! Next, you can learn about subtraction with bigger numbers and 'borrowing'. This will help you solve even more complex problems easily.
