What is 8 - 5? | Simple Explanation for Class 1

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What is 8 - 5?

Grade Level:

Class 1

Maths, Computing, AI

Definition

What is it?

8 - 5 is a subtraction problem. It means taking away 5 from 8 to find out what is left. Subtraction helps us find the difference between two numbers.

Simple Example

Quick Example

Imagine you have 8 ladoos. If you eat 5 of them, how many ladoos are left? You start with 8, take away 5, and the number remaining is your answer.

Worked Example

Step-by-Step

Let's find out what 8 - 5 is:

Step 1: Start with the first number, which is 8. You can think of having 8 items, like 8 cricket balls.

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Step 2: The minus sign (-) tells us to take away or subtract.

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Step 3: The second number is 5. This means we need to take away 5 cricket balls from the 8 you started with.

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Step 4: Count backwards 5 steps from 8. So, 8 (start) -> 7 (1st step) -> 6 (2nd step) -> 5 (3rd step) -> 4 (4th step) -> 3 (5th step).

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Step 5: After taking away 5, you are left with 3.

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Answer: So, 8 - 5 = 3.

Why It Matters

Understanding subtraction is super important for Maths, Computing, and even AI! In computing, it helps calculate changes in data, like how much battery is left on your phone. AI uses it in complex calculations, for example, to figure out the difference between predicted and actual results in machine learning models. Engineers and data scientists use subtraction every day.

Common Mistakes

MISTAKE: Subtracting the smaller number from the larger number when the order is reversed (e.g., thinking 5 - 8 is 3) | CORRECTION: Always subtract the second number from the first number. 8 - 5 is not the same as 5 - 8.

MISTAKE: Counting incorrectly when subtracting (e.g., saying 8, 7, 6, 5, 4 and stopping at 4 after 5 steps) | CORRECTION: Make sure to count each step carefully. From 8, the first step back is 7, the second is 6, and so on.

MISTAKE: Confusing subtraction with addition (e.g., adding 8 and 5 instead of subtracting) | CORRECTION: Look carefully at the symbol. A minus sign (-) means subtract, a plus sign (+) means add.

Practice Questions

Try It Yourself

QUESTION: You have 7 mangoes and eat 3. How many are left? | ANSWER: 4

QUESTION: A bus has 9 passengers. At the next stop, 4 passengers get off. How many passengers are left on the bus? | ANSWER: 5

QUESTION: Your elder brother had 10 stickers. He gave 2 to you and 3 to your friend. How many stickers does he have now? | ANSWER: 5

MCQ

Quick Quiz

What is the result of 8 minus 5?

The Correct Answer Is:

When you take 5 away from 8, you are left with 3. Options A, C, and D are incorrect results of this subtraction.

Real World Connection

In the Real World

When you check your mobile data usage, you might see you started with 10 GB and have used 7 GB. To find out how much is left, your phone does a subtraction: 10 - 7 = 3 GB. This simple math helps you manage your data plan, just like how food delivery apps calculate remaining time for your order.

Key Vocabulary

Key Terms

SUBTRACTION: Taking one number away from another to find the difference | DIFFERENCE: The result you get when you subtract one number from another | MINUS SIGN (-): The symbol used to show subtraction | REMAINDER: What is left after subtraction

What's Next

What to Learn Next

Great job understanding basic subtraction! Next, you can learn about 'Subtraction with Larger Numbers' or 'Subtraction with Borrowing'. These concepts build on what you've learned here and will help you solve even bigger subtraction problems.