Simplification Techniques for Fast Calculation
Simplification Mastery (Professional Level)
Simplification is the fastest scoring section in bank exams. Mastering this topic can save time for other sections.
1. BODMAS Rule (Core Concept)
B → Brackets
O → Orders (powers, roots)
D → Division
M → Multiplication
A → Addition
S → Subtraction
Solve expressions step by step following this order
Example
48 ÷ 6 × 2 + 5 = ?
Step 1: 48 ÷ 6 = 8
Step 2: 8 × 2 = 16
Step 3: 16 + 5 = 21
2. Approximation Trick
Use rounding for faster calculation.
Example: 498 × 19 ≈ 500 × 20 = 10000
Used when options are far apart
3. Important Fraction Values
- 1/2 = 0.5
- 1/4 = 0.25
- 1/5 = 0.2
- 1/8 = 0.125
4. Fraction to Percentage
- 1/2 = 50%
- 1/4 = 25%
- 1/5 = 20%
- 1/10 = 10%
5. Important Squares (Must Memorize)
1² = 1
5² = 25
10² = 100
15² = 225
20² = 400
6. Cancellation Trick
Cancel common factors before solving.
Example: (48 × 25) ÷ 4 = (12 × 25) = 300
Speed Strategy
- Follow BODMAS strictly
- Use approximation smartly
- Memorize squares and fractions
- Cancel values early
Practice Questions
1. 36 ÷ 6 × 3 + 4 = ?
2. 499 × 21 ≈ ?
3. 1/4 of 200 = ?
4. (60 × 5) ÷ 10 = ?
Practice Improves Speed and Accuracy
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