Jawahar Navodaya Vidyalaya Selection Test (JNVST)
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Operations on Numbers: Addition, subtraction, multiplication, and division techniques
🚀 Operations on numbers are fundamental skills that help us in our daily lives, whether we're shopping at the market, cooking at home, or planning a trip. Let's explore the four basic operations: addition, subtraction, multiplication, and division, using examples from everyday life in India.
Examples💡
Example 1: Addition - Riya has 150 rupees, and her friend gives her 200 more. How much money does Riya have now? Solution: 150 + 200 = 350 rupees.
Example 2: Subtraction - A shopkeeper had 500 kg of rice. He sold 150 kg. How much rice is left? Solution: 500 - 150 = 350 kg.
Example 3: Multiplication - If one pen costs 5 rupees, how much do 8 pens cost? Solution: 5 x 8 = 40 rupees.
Common Mistakes to Avoid⚠️
- Mistake: Forgetting to carry over numbers in addition. Correction: Always remember to carry over when the sum of a column exceeds 9.
- Mistake: Subtracting a larger number from a smaller one without borrowing. Correction: Always borrow from the next column if needed.
- Mistake: Misplacing the decimal point in multiplication. Correction: Count the decimal places in the numbers being multiplied and ensure the product has the same number of decimal places.