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What is 10 - 7?
Grade Level:
Class 1
Maths, Computing, AI
Definition
What is it?
10 - 7 means taking away 7 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 quantity.
Simple Example
Quick Example
Imagine you have 10 ladoos for Diwali. If you eat 7 of them, how many ladoos are left? This is 10 - 7. You are finding out the remaining number of ladoos.
Worked Example
Step-by-Step
Let's find out what is 10 - 7 using a simple method.
Step 1: Start with 10 items. You can imagine 10 fingers, 10 pencils, or 10 dots on a paper.
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Step 2: Now, we need to 'take away' 7 from these 10 items. So, count 7 items and remove them.
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Step 3: If you had 10 fingers up, put down 7 fingers.
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Step 4: Count how many items are left. If you put down 7 fingers, you will see 3 fingers still up.
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Answer: So, 10 - 7 = 3.
Why It Matters
Understanding subtraction is crucial for everyday tasks and even advanced fields. In computing, it's used in basic calculations for programs and apps. For AI, algorithms often use subtraction to compare values or adjust settings. It's a foundational skill for careers in finance, data analysis, and even game development.
Common Mistakes
MISTAKE: Counting incorrectly when taking away, leading to a wrong total. For example, counting 6 instead of 7 when removing. | CORRECTION: Double-check your counting when removing items. Count aloud or use your fingers carefully.
MISTAKE: Adding the numbers instead of subtracting them. For example, thinking 10 - 7 is 17. | CORRECTION: Remember the minus sign (-) means 'take away' or 'find the difference', not 'add'.
MISTAKE: Always subtracting the smaller number from the larger number, even if the order is reversed (e.g., thinking 7 - 10 is the same as 10 - 7). | CORRECTION: Subtraction order matters. 10 - 7 is different from 7 - 10. For Class 1, we focus on subtracting a smaller number from a larger one.
Practice Questions
Try It Yourself
QUESTION: You had 8 cricket balls. Your friend took 3. How many balls are left? | ANSWER: 5
QUESTION: A bus started with 12 passengers. At the first stop, 5 passengers got off. How many passengers are now on the bus? | ANSWER: 7
QUESTION: Rina had 15 rupees. She bought a small packet of biscuits for 6 rupees and a candy for 2 rupees. How much money does Rina have left? | ANSWER: 7 rupees
MCQ
Quick Quiz
What is the result of 10 minus 7?
17
3
7
10
The Correct Answer Is:
B
10 minus 7 means taking 7 away from 10. If you count back 7 from 10 (10, 9, 8, 7, 6, 5, 4), you land on 3. Options A, C, and D are incorrect as they represent addition, the number being subtracted, or the starting number.
Real World Connection
In the Real World
Subtraction is used every day! When you check your mobile data balance, you see how much data you started with and how much you've used; the difference is what's left. Shopkeepers use it to calculate change for customers. Even when planning a train journey, you might subtract the current time from the arrival time to know how many hours are left.
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: The symbol (-) used for subtraction, meaning 'take away' | REMAINDER: What is left after a part has been taken away
What's Next
What to Learn Next
Great job understanding 10 - 7! Next, you can explore 'Subtraction with larger numbers' or 'Subtraction with borrowing'. These concepts will build on what you've learned here, helping you solve even bigger and more interesting math problems!
