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What is 4 - 1?
Grade Level:
Class 1
Maths, Computing, AI
Definition
What is it?
4 - 1 means taking away 1 from the number 4. It is a basic subtraction problem where you find the difference between two numbers. The answer tells you how many are left after you remove a certain amount.
Simple Example
Quick Example
Imagine you have 4 delicious ladoos. If your friend eats 1 ladoo, how many ladoos are left for you? You started with 4 and 1 was taken away, so 4 - 1 gives you the remaining ladoos.
Worked Example
Step-by-Step
Let's find out what 4 - 1 is.
Step 1: Start with the first number, which is 4.
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Step 2: Think of 4 items. For example, 4 cricket balls.
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Step 3: The minus sign (-) means we need to take away or remove.
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Step 4: We need to take away the second number, which is 1.
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Step 5: So, remove 1 cricket ball from the 4 balls.
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Step 6: Count how many cricket balls are left.
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Step 7: You will find 3 cricket balls remaining.
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Answer: So, 4 - 1 = 3.
Why It Matters
Understanding basic subtraction like 4 - 1 is crucial for solving bigger math problems and even for subjects like Computing and AI. Engineers use subtraction to calculate distances, programmers use it to manage data, and AI systems use it for decision-making. It's a foundation for many cool careers!
Common Mistakes
MISTAKE: Adding the numbers instead of subtracting (e.g., thinking 4 - 1 = 5) | CORRECTION: Remember the minus sign (-) means 'take away' or 'remove', not 'add'.
MISTAKE: Confusing the order of numbers (e.g., thinking 1 - 4 is the same as 4 - 1) | CORRECTION: Subtraction order matters. Always start with the first number and take away the second number from it.
MISTAKE: Counting incorrectly after removing (e.g., counting 4, removing 1, and still counting 4) | CORRECTION: Physically or mentally remove the item, then carefully count the remaining items.
Practice Questions
Try It Yourself
QUESTION: You have 4 pens. You give 1 pen to your friend. How many pens do you have left? | ANSWER: 3
QUESTION: A bus has 4 empty seats. If 1 person sits down, how many empty seats are left? | ANSWER: 3
QUESTION: Riya had 4 rupees. She bought a small candy for 1 rupee. How much money does Riya have now? | ANSWER: 3 rupees
MCQ
Quick Quiz
What is the result of 4 minus 1?
5
3
4
1
The Correct Answer Is:
B
When you take away 1 from 4, you are left with 3. Options A, C, and D are incorrect as they represent addition, the original number, or the number being subtracted, respectively.
Real World Connection
In the Real World
When you're shopping at a local kirana store and have 4 items in your basket, but decide to put 1 item back, you are doing 4 - 1. Or, if your phone battery is at 4% and it drops by 1%, you're using this basic subtraction to know it's now at 3%.
Key Vocabulary
Key Terms
SUBTRACTION: Taking one number away from another | MINUS SIGN (-): The symbol used for subtraction | DIFFERENCE: The result of subtraction | TAKE AWAY: To remove a quantity from another
What's Next
What to Learn Next
Great job understanding 4 - 1! Next, you can learn about subtracting bigger numbers and subtracting zero. These concepts will build on what you've learned and help you solve even more interesting math problems!
