Approximation Tricks (Fast Calculation) – Bank Exams
Speed Booster • Smart Guessing • Time Saving
1. What is Approximation?
Approximation means solving questions by rounding values.
👉 Used when exact value is not required
2. Basic Rounding Rules
- 49 ≈ 50
- 102 ≈ 100
- 498 ≈ 500
Round to nearest easy number (10, 100, 1000)
3. Division Approximation
👉 Example:
498 ÷ 9 ≈ 500 ÷ 10 = 50 ✔
4. Multiplication Approximation
👉 Example:
49 × 21 ≈ 50 × 20 = 1000 ✔
5. Square Approximation
49² ≈ 50² = 2500 ✔
6. When to Use?
- Options are far apart ✔
- Time is less ✔
- Complex calculation ✔
7. Common Mistakes
- Over-rounding ❌
- Ignoring options ❌
- Wrong estimation ❌
8. Topper Tip
Always check options before approximation. Choose nearest correct answer.
9. Quick Practice
51 × 19 ≈ ?
👉 50 × 20 = 1000 ✔
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