Bank Exam Practice Material Series – Page 4
Approximation Tricks, Speed Maths & Fast Calculation Methods
Shaktimatha Learning – Quantitative Aptitude Practice Hub
Learn Approximation shortcut tricks, rounding methods, fast calculations, and mental maths techniques for Bank Exams, SSC, Railways, Insurance, and Competitive Exams.
Learn Approximation shortcut tricks, rounding methods, fast calculations, and mental maths techniques for Bank Exams, SSC, Railways, Insurance, and Competitive Exams.
Importance of Approximation
Approximation is one of the most important scoring topics in competitive exams. This topic helps students improve:
- Calculation speed
- Mental maths ability
- Numerical accuracy
- Time management
- Fast problem-solving skills
Important Approximation Concepts
- Rounding Off Numbers
- Simplification Methods
- Percentage Approximation
- Square Root Approximation
- Division Approximation
- Fast Multiplication Tricks
Basic Approximation Formula
0
Speed Tricks for Approximation
Rounding Off Trick
Example:
499 + 201
Approximate values:
- 499 ≈ 500
- 201 ≈ 200
500 + 200
Answer ≈ 700
Multiplication Approximation Trick
Example:
48 × 19
Approximate values:
- 48 ≈ 50
- 19 ≈ 20
50 × 20
Answer ≈ 1000
Division Approximation Trick
Example:
998 ÷ 49
Approximate values:
- 998 ≈ 1000
- 49 ≈ 50
1000 ÷ 50
Answer ≈ 20
Square Root Approximation
1Example:
√630 ≈ 25
Because 25² = 625
Important Approximation Values
| Actual Value | Approximate Value | Actual Value | Approximate Value |
|---|---|---|---|
| 99 | 100 | 49 | 50 |
| 198 | 200 | 74 | 75 |
| 497 | 500 | 149 | 150 |
| 1002 | 1000 | 248 | 250 |
Practice Questions
Question 1
Approximate:
498 + 302
500 + 300
Answer ≈ 800
Question 2
Approximate:
52 × 21
50 × 20
Answer ≈ 1000
Question 3
Approximate:
999 ÷ 51
1000 ÷ 50
Answer ≈ 20
Question 4
Approximate:
√390
Nearest square:
20² = 400
Answer ≈ 20
Question 5
Approximate:
76% of 198
Approximate values:
- 76 ≈ 75
- 198 ≈ 200
75% of 200
Answer ≈ 150
Important Exam Tips
- Round numbers carefully
- Use nearest values for fast solving
- Avoid unnecessary detailed calculations
- Practice multiplication shortcuts
- Improve mental approximation daily
Fast Formula Revision
| Topic | Formula |
|---|---|
| Percentage | Value × Percentage / 100 |
| Average | Sum / Number |
| Approximation | Nearest Value |
| Square Root | √x |
| Division | Numerator / Denominator |
Daily Practice Strategy
- Practice 20 approximation questions daily
- Learn rounding techniques
- Practice mental calculations
- Improve multiplication speed
- Revise square values regularly
Fast calculations and smart approximation improve competitive exam performance.
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Bank Exam Practice Material Series
Bank Exam Practice Material Series
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