Exercise 4d: Rational Numbers
Rational numbers are numbers that can be expressed as a ratio of two integers. In this exercise, we will be working with various operations involving rational numbers.

Steps to solve Exercise 4d:

1. Addition and Subtraction:
- To add or subtract rational numbers, you need to find a common denominator.
- Once you have a common denominator, add or subtract the numerators.

2. Multiplication:
- To multiply rational numbers, simply multiply the numerators and denominators.
- Remember to simplify the result by cancelling out common factors.

3. Division:
- To divide rational numbers, multiply the first number by the reciprocal of the second number.
- Simplify the resulting fraction by cancelling out common factors.

4. Solving Equations:
- When solving equations involving rational numbers, follow the order of operations (PEMDAS).
- Remember to simplify your answer and check for any extraneous solutions.

5. Word Problems:
- Practice solving word problems involving rational numbers to understand real-life applications.
- Translate the given information into mathematical expressions and solve accordingly.

6. Practice, Practice, Practice:
- The key to mastering rational numbers is practice. Work on various problems to improve your skills.
- Review your mistakes and understand the concepts behind them.
By following these steps and practicing regularly, you will be able to tackle Exercise 4d on rational numbers with confidence and accuracy.