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What is 10 - 3?
Grade Level:
Class 1
Maths, Computing, AI
Definition
What is it?
10 - 3 means taking away 3 from 10. It is a basic subtraction problem where you find the difference between two numbers. The result tells you how many are left after you remove a certain amount.
Simple Example
Quick Example
Imagine you have 10 ladoos for a party. Your friend eats 3 of them. How many ladoos are left for the party? You would do 10 - 3 to find out.
Worked Example
Step-by-Step
Let's calculate 10 - 3.
Step 1: Start with the first number, which is 10.
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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 3, so we need to take away 3 from 10.
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Step 4: You can count backwards: Start at 10, then count 9, 8, 7. We counted back 3 times.
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Step 5: So, 10 - 3 = 7.
Answer: 7
Why It Matters
Understanding subtraction is fundamental for Maths, Computing, and even AI. In computing, it helps in managing resources or tracking changes. For AI, it's a building block for more complex calculations needed in data analysis or decision-making, opening doors to careers in software development or data science.
Common Mistakes
MISTAKE: Counting forward instead of backward. For example, some might count 10, 11, 12, 13 for 10 - 3. | CORRECTION: Remember the minus sign means 'take away' or 'reduce'. Always count backward from the first number.
MISTAKE: Getting confused with addition. For example, thinking 10 - 3 is the same as 10 + 3. | CORRECTION: Subtraction makes the number smaller, while addition makes it bigger. Pay close attention to the operator symbol.
MISTAKE: Not understanding 'difference'. For example, if asked 'What is the difference between 10 and 3?', some might not know it means 10 - 3. | CORRECTION: 'Difference' in maths always implies subtraction. It's asking how much larger one number is than the other.
Practice Questions
Try It Yourself
QUESTION: You have 8 pencils and give 2 to your friend. How many pencils are left? | ANSWER: 6
QUESTION: A cricket team scored 12 runs in the first over. They lost 5 runs due to a penalty. What is their new score? | ANSWER: 7
QUESTION: You had 15 rupees. You bought a small pack of biscuits for 5 rupees and then gave 3 rupees to a needy person. How much money do you have left? | ANSWER: 7
MCQ
Quick Quiz
What is the result of 10 - 3?
13
7
6
8
The Correct Answer Is:
B
When you take 3 away from 10, you are left with 7. Option A is addition, and options C and D are incorrect subtractions.
Real World Connection
In the Real World
Subtraction is used every day! When you pay for groceries with a 100 rupee note and the bill is 70 rupees, the shopkeeper uses subtraction (100 - 70) to give you 30 rupees back. Or, if a delivery app shows 10 minutes for your order, but 3 minutes have passed, it uses subtraction to show 7 minutes remaining.
Key Vocabulary
Key Terms
SUBTRACTION: Taking one number away from another | DIFFERENCE: The result of subtracting one number from another | MINUS: The symbol (-) used to show subtraction | OPERATOR: A symbol like + or - that tells you to do a mathematical action
What's Next
What to Learn Next
Great job mastering basic subtraction! Next, you can explore 'Subtraction with Larger Numbers' or 'Subtraction with Borrowing'. These build on what you've learned here and help you solve more complex problems efficiently.
