NIMCET Fundamentals of Calculations (Quantitative Aptitude): Basic Tricks and Questions

Calculations are an important part of NIMCET Quantitative Aptitude. Even when a question looks simple, spending too much time on basic arithmetic can affect the time available for other questions.

The NIMCET fundamentals of calculations session focuses on improving speed and accuracy in addition, subtraction and multiplication. Instead of depending on pen and paper for every calculation, you can use simple mental methods to break numbers into easier parts.

These techniques are especially useful when solving quantitative aptitude questions under time pressure.

NIMCET Basic Calculations

The basic calculations you should practise include:

• Addition of single, double, triple and four-digit numbers

• Subtraction using forward counting

• Multiplication using the distributive property

• Working with numbers close to 10, 100 or 1,000

• Mental calculation without unnecessary writing

• Improving calculation speed while maintaining accuracy

The aim is not simply to calculate faster. You should also be able to reach the correct answer without making avoidable mistakes.

Mental Addition Techniques

A simple way to improve addition speed is to break numbers into smaller parts.

Single-Digit Addition

For small numbers, try to develop instant recall.

For example:

• 4 + 7 = 11

• 8 + 9 = 17

With regular practice, these calculations can become automatic.

Making Tens

When adding a number close to 10, make a complete 10 first.

For example:

9 + 4

Think:

9 + 1 = 10

Then add the remaining 3:

10 + 3 = 13

Therefore:

9 + 4 = 13

Two-Digit Addition

Consider:

47 + 34

You can break 34 into 30 + 4:

47 + 30 = 77

77 + 4 = 81

Therefore:

47 + 34 = 81

Another method is to round 47 to 50:

50 + 34 = 84

Since 47 is 3 less than 50:

84 - 3 = 81

Both methods give the same answer.

Three-Digit Addition

For larger numbers, separate the hundreds from the remaining digits.

For example:

447 + 229

First add the hundreds:

400 + 200 = 600

Then add the remaining numbers:

47 + 29 = 76

Now:

600 + 76 = 676

Therefore:

447 + 229 = 676

Addition of Larger Numbers

The same method can be used for larger calculations.

Consider:

824 + 576

You can combine the last two digits:

24 + 76 = 100

Now add the hundreds:

800 + 500 = 1,300

Add the extra 100:

1,300 + 100 = 1,400

Therefore:

824 + 576 = 1,400

Another example is:

946 + 689

46 + 89 = 135

900 + 600 = 1,500

Therefore:

1,500 + 135 = 1,635

So:

946 + 689 = 1,635

Mental Subtraction Techniques

Subtraction can also be made easier by counting forward from the smaller number to the larger number. This is particularly useful when the numbers are close to multiples of 10, 100 or 1,000.

Two-Digit Subtraction

Consider:

47 - 29

Instead of subtracting 29 directly, first subtract 30:

47 - 30 = 17

Since 29 is 1 less than 30, add 1:

17 + 1 = 18

Therefore:

47 - 29 = 18

You can also use forward counting:

29 → 30 = 1

30 → 47 = 17

Total:

1 + 17 = 18

Three-Digit Subtraction

Consider:

176 - 49

Count from 49 to 50:

49 → 50 = 1

Then:

50 → 176 = 126

Therefore:

1 + 126 = 127

So:

176 - 49 = 127

Subtraction Using Convenient Numbers

Consider:

441 - 289

Count forward:

289 → 290 = 1

290 → 300 = 10

300 → 441 = 141

Now add:

1 + 10 + 141 = 152

Therefore:

441 - 289 = 152

Subtraction of Larger Numbers

Forward counting can also be used for larger numbers.

For example:

872 - 384

384 → 400 = 16

400 → 872 = 472

Therefore:

16 + 472 = 488

So:

872 - 384 = 488

Another example:

1,741 - 688

688 → 700 = 12

700 → 1,741 = 1,041

Therefore:

12 + 1,041 = 1,053

So:

1,741 - 688 = 1,053

For:

4,707 - 2,948

2,948 → 3,000 = 52

3,000 → 4,707 = 1,707

Therefore:

52 + 1,707 = 1,759

So:

4,707 - 2,948 = 1,759

Multiplication Using the Distributive Property

The distributive property can make multiplication easier. Instead of multiplying a large number at once, break it into smaller numbers.

The basic rule is:

a × (b + c) = (a × b) + (a × c)

Example 1: 99 × 7

Break 99 into 90 + 9:

90 × 7 = 630

9 × 7 = 63

Now add:

630 + 63 = 693

Therefore:

99 × 7 = 693

Example 2: 78 × 8

Break 78 into 70 + 8:

70 × 8 = 560

8 × 8 = 64

Therefore:

560 + 64 = 624

So:

78 × 8 = 624

Example 3: 88 × 7

Break 88 into 80 + 8:

80 × 7 = 560

8 × 7 = 56

Therefore:

560 + 56 = 616

So:

88 × 7 = 616

Example 4: 47 × 9

Break 47 into 40 + 7:

40 × 9 = 360

7 × 9 = 63

Therefore:

360 + 63 = 423

So:

47 × 9 = 423

NIMCET Maths Calculation Tricks

Some simple calculation habits can help you save time while solving NIMCET quantitative aptitude questions:

• Break large numbers into smaller parts.

• Use numbers close to 10, 100 or 1,000 whenever possible.

• Learn multiplication tables for quick recall.

• Use forward counting for difficult subtraction.

• Use the distributive property for multiplication.

• Avoid writing every small calculation if you can do it mentally.

• Practise regularly instead of trying to memorise too many shortcuts at once.

• Focus on accuracy before trying to increase speed.

Importance of Accuracy in NIMCET Calculations

Speed is useful in a competitive exam, but accuracy is equally important. A calculation mistake can affect the final answer even when your approach to the question is correct.

Therefore, do not use a shortcut if you are not comfortable with it. First learn the method correctly and then practise it until you can use it quickly.

A good approach is to start with simple calculations and gradually move to larger numbers.

How to Practise NIMCET Calculation Questions?

Regular practice is the easiest way to improve calculation speed. Start with basic addition, subtraction and multiplication, and gradually increase the difficulty.

You can follow this routine:

1. Revise multiplication tables regularly.

2. Practise mental addition for a few minutes.

3. Solve subtraction questions using forward counting.

4. Practise multiplication using the distributive property.

5. Set a timer and solve a group of questions.

6. Check your answers and note your mistakes.

7. Repeat the questions where you made errors.

The focus should be on getting the correct answer first and then reducing the time taken.

Common Mistakes in Basic Calculations

While practising NIMCET basic calculations, students often make mistakes because they try to calculate too quickly.

Some common mistakes include:

• Making errors while carrying numbers in addition.

• Forgetting the adjustment after rounding a number.

• Miscounting while using forward subtraction.

• Making multiplication errors with basic tables.

• Using a shortcut without understanding the calculation.

• Sacrificing accuracy just to save a few seconds.

Practise slowly in the beginning. Once the method becomes familiar, your speed will improve naturally.

NIMCET Calculation Questions for Practice

Try solving these without using a calculator:

1. 48 + 37 = ?

2. 625 + 378 = ?

3. 92 - 47 = ?

4. 725 - 389 = ?

5. 76 × 8 = ?

6. 99 × 6 = ?

Answers

1. 85

2. 1,003

3. 45

4. 336

5. 608

6. 594

Try solving these questions mentally and then check your answers. This will help you understand how much time you need for basic calculations.

NIMCET Quantitative Aptitude Questions

Basic calculations are used across different types of NIMCET Quantitative Aptitude questions. Even when a question involves a more advanced concept, you may still need to perform addition, subtraction, multiplication or division to reach the final answer.

Building a strong calculation base can therefore help you spend more time understanding the actual question instead of getting stuck on simple arithmetic.

NIMCET Fundamentals of Calculations form the base for faster problem-solving in Quantitative Aptitude. Techniques such as breaking numbers into parts, forward counting and using the distributive property can make basic calculations easier. Practise these methods regularly and focus on accuracy first. With consistent practice, you can gradually improve your calculation speed and solve NIMCET quantitative aptitude questions more confidently.

Preparation Resources:

• PW NIMCET Online Batches

• PW NIMCET YouTube Channel

• NIMCET Blood Relations

• NIMCET Alphanumeric Series