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What is 9 - 8?
Grade Level:
Class 1
Maths, Computing, AI
Definition
What is it?
Subtracting means taking one number away from another. When we ask 'What is 9 - 8?', we are finding out how much is left if we start with 9 and remove 8.
Simple Example
Quick Example
Imagine you have 9 ladoos. If your friend eats 8 of them, how many ladoos are left for you? You started with 9, 8 were eaten, so 1 ladoo is left.
Worked Example
Step-by-Step
Let's find out what is 9 - 8 using fingers.
Step 1: Hold up 9 fingers on both your hands.
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Step 2: Now, count 8 fingers and put them down (fold them).
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Step 3: Count how many fingers are still standing up.
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Step 4: You will see that only 1 finger is standing up.
So, 9 - 8 = 1.
Why It Matters
Understanding subtraction is super important for Maths, Computing, and even AI! It helps you manage money, understand data, and is a basic building block for coding. Engineers, data scientists, and even app developers use subtraction every day.
Common Mistakes
MISTAKE: Thinking 9 - 8 is the same as 8 - 9 | CORRECTION: Subtraction order matters! 9 - 8 is 1, but 8 - 9 is a negative number (-1).
MISTAKE: Counting extra or fewer items when subtracting | CORRECTION: Always double-check your count. Use fingers, lines, or objects to be sure you're taking away the correct amount.
MISTAKE: Getting confused when the numbers are close | CORRECTION: Remember that when you subtract a number from itself (like 8-8), the answer is 0. When numbers are very close, the answer is often 1.
Practice Questions
Try It Yourself
QUESTION: You have 7 crayons and give 6 to your brother. How many do you have left? | ANSWER: 1
QUESTION: A bus has 10 seats. If 9 people are already sitting, how many seats are empty? | ANSWER: 1
QUESTION: Your mobile phone had 10 GB of data. You used 8 GB for watching videos and 1 GB for online classes. How much data is left? | ANSWER: 1 GB (10 - 8 - 1 = 1)
MCQ
Quick Quiz
What is the result of 9 minus 8?
0
1
2
17
The Correct Answer Is:
B
When you take 8 away from 9, only 1 is left. Option B is correct because 9 - 8 = 1. Options A, C, and D are incorrect calculations.
Real World Connection
In the Real World
Imagine you're at a cricket match. The commentator says 'India needs 9 runs to win, and they have scored 8 runs so far.' To know how many more runs are needed, you subtract: 9 - 8 = 1 run. This simple calculation helps you follow the game!
Key Vocabulary
Key Terms
SUBTRACTION: Taking one number away from another | DIFFERENCE: The answer you get after subtracting | MINUS: A symbol (-) used for subtraction | REMAINDER: What is left after subtraction
What's Next
What to Learn Next
Great job with basic subtraction! Next, you can learn 'What is 10 - 5?'. This will help you practice subtracting larger numbers and prepare you for more complex math problems.
