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What is 10 - 5?
Grade Level:
Class 1
Maths, Computing, AI
Definition
What is it?
10 - 5 means starting with 10 things and taking away 5 of them. It's a basic subtraction problem where you find out how many are left after removing some items.
Simple Example
Quick Example
Imagine you have 10 ladoos on a plate. If your friend eats 5 of them, how many ladoos are left for you? You started with 10, removed 5, so 10 - 5 gives you the remaining ladoos.
Worked Example
Step-by-Step
Let's solve 10 - 5:
1. Start with the number 10.
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2. We need to subtract 5. Think of this as counting backwards 5 steps from 10.
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3. Count back one step: 10 becomes 9.
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4. Count back a second step: 9 becomes 8.
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5. Count back a third step: 8 becomes 7.
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6. Count back a fourth step: 7 becomes 6.
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7. Count back a fifth step: 6 becomes 5.
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So, 10 - 5 = 5.
Why It Matters
Understanding basic subtraction like 10 - 5 is crucial for higher Maths, Computing, and even AI. It's the foundation for managing budgets, writing simple computer programs, and understanding data analysis. Careers like software developer, data scientist, or financial analyst all use these core ideas.
Common Mistakes
MISTAKE: Adding the numbers instead of subtracting (e.g., 10 + 5 = 15). | CORRECTION: Remember the minus sign (-) means 'take away' or 'subtract'.
MISTAKE: Counting forward instead of backward (e.g., 10, 11, 12, 13, 14, 15). | CORRECTION: Subtraction means decreasing the number, so you always count backwards.
MISTAKE: Subtracting the first number from the second (e.g., thinking 5 - 10). | CORRECTION: Always subtract the second number from the first number given in the problem.
Practice Questions
Try It Yourself
QUESTION: You have 8 pencils and give 3 to your friend. How many pencils do you have left? | ANSWER: 5
QUESTION: A bus has 12 passengers. At the next stop, 4 passengers get off. How many passengers are left on the bus? | ANSWER: 8
QUESTION: Riya had 15 rupees. She bought a small packet of biscuits for 5 rupees and then a candy for 3 rupees. How much money does Riya have left? | ANSWER: 7 rupees (15 - 5 = 10, then 10 - 3 = 7)
MCQ
Quick Quiz
What is the result of 10 - 5?
15
5
10
0
The Correct Answer Is:
B
10 - 5 means taking 5 away from 10. If you count back 5 steps from 10 (10, 9, 8, 7, 6, 5), you land on 5. So, 5 is the correct answer.
Real World Connection
In the Real World
When you manage your pocket money, you use subtraction. If you get 100 rupees and spend 50 rupees on a snack, you calculate 100 - 50 to know how much is left. This is similar to how shopkeepers calculate change or how parents manage household expenses.
Key Vocabulary
Key Terms
SUBTRACTION: Taking one number or quantity away from another to find the difference | MINUS SIGN (-): The symbol used to show subtraction | DIFFERENCE: The result you get after subtracting one number from another | COUNTING BACKWARDS: Starting from a number and decreasing it by one at a time.
What's Next
What to Learn Next
Great job understanding 10 - 5! Next, you can explore subtraction with larger numbers and learn about borrowing (regrouping). This will help you solve even bigger real-world problems more easily.
