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What is 10 - 4?
Grade Level:
Class 1
Maths, Computing, AI
Definition
What is it?
10 - 4 is a subtraction problem asking us to find the difference between the number 10 and the number 4. Subtraction means taking away a smaller number from a larger number to see how much is left.
Simple Example
Quick Example
Imagine you have 10 laddoos for a festival. If your friend eats 4 laddoos, how many laddoos are left for you? You would do 10 - 4 to find the answer.
Worked Example
Step-by-Step
Let's find the answer to 10 - 4 using a number line.
Step 1: Start at the number 10 on your number line.
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Step 2: Since we are subtracting 4, we need to move 4 steps backward (to the left) from 10.
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Step 3: Take the first step backward: 10 -> 9.
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Step 4: Take the second step backward: 9 -> 8.
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Step 5: Take the third step backward: 8 -> 7.
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Step 6: Take the fourth step backward: 7 -> 6.
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Step 7: You have landed on the number 6.
So, 10 - 4 = 6.
Why It Matters
Understanding subtraction is super important for daily life and even for advanced fields like Computing and AI. Whether you're a software engineer coding a game or an AI researcher building smart systems, basic arithmetic like this is the foundation. It helps in managing data, calculating probabilities, and even designing algorithms.
Common Mistakes
MISTAKE: Adding the numbers instead of subtracting (e.g., 10 + 4 = 14) | CORRECTION: Remember the minus sign (-) means 'take away' or 'find the difference', not 'add'.
MISTAKE: Counting forward instead of backward on a number line (e.g., starting at 10 and counting 4 steps to 14) | CORRECTION: For subtraction, always count backward (to the left) on the number line.
MISTAKE: Making a small counting error (e.g., counting only 3 steps instead of 4, getting 7) | CORRECTION: Double-check your counting. You can use fingers, draw dots, or re-count on the number line carefully.
Practice Questions
Try It Yourself
QUESTION: What is 8 - 3? | ANSWER: 5
QUESTION: If you have 12 pens and give 5 to your friend, how many pens do you have left? | ANSWER: 7
QUESTION: A bus started with 15 passengers. At the first stop, 6 passengers got off. How many passengers are left on the bus? | ANSWER: 9
MCQ
Quick Quiz
Which of these shows the correct answer for 10 - 4?
14
6
5
7
The Correct Answer Is:
B
The correct answer is 6 because when you take away 4 from 10, 6 is what remains. Options A, C, and D are incorrect as they represent addition or incorrect subtraction.
Real World Connection
In the Real World
When you are checking your mobile data usage, you might see you started with 10 GB and have used 4 GB. To know how much data is left, your phone's system does a quick 10 - 4 calculation. This is also how shopkeepers calculate change when you buy something.
Key Vocabulary
Key Terms
SUBTRACTION: Taking one number away from another | DIFFERENCE: The result of subtraction | MINUS SIGN (-): The symbol used for subtraction | NUMBER LINE: A line with numbers marked on it, used to visualize operations
What's Next
What to Learn Next
Great job understanding basic subtraction! Next, you can learn about subtracting larger numbers, subtraction with borrowing, and how subtraction is used in word problems. This will help you solve more complex calculations easily.
