Lesson 4: Revision and Practice

📚 Introduction

Congratulations! 🎉 You’ve completed all the lessons in Module 2: Whole Numbers, Integers, and Rational Numbers.

Before we move forward, let’s review and practice everything you’ve learned about:

• Operations on Whole Numbers (addition, subtraction, multiplication, division)
• Working with Positive and Negative Integers
• Understanding and Operating with Rational Numbers (fractions and decimals)

This revision will help you strengthen your memory and boost your skills! 🧠💪

🧠 Quick Summary

Whole Numbers

• Whole numbers are 0, 1, 2, 3, 4, etc. (no fractions or decimals).
• Basic operations: add, subtract, multiply, divide.

Positive and Negative Integers

• Adding same signs: add and keep the sign.
• Adding different signs: subtract and take the sign of the bigger number.
• Multiplying/Dividing:
  • Same signs → Positive
  • Different signs → Negative

Rational Numbers

• Rational numbers can be written as fractions ().
• To add/subtract fractions: find a common denominator.
• To multiply: multiply numerators and denominators.
• To divide: flip the second fraction and multiply.

📝 Mixed Practice Exercises

Part A: Whole Numbers

1. Find: 458 + 637
2. Find: 905 – 478
3. Multiply: 36 × 17
4. Divide: 864 ÷ 9

Part B: Integers

1. Find: (-7) + (-5)
2. Find: (+8) – (-6)
3. Multiply: (-5) × (+9)
4. Divide: (-48) ÷ (-6)

Part C: Rational Numbers

1. 1. Add: +

1. 1. Subtract: –

1. 1. Multiply: ×

1. Divide: ÷

📝 Extra Challenge Problems

Challenge 1: Integers

The temperature was -5°C. It dropped by another 8°C. What is the new temperature?

Challenge 2: Rational Numbers

A jug contains litre of water. litre is poured out. How much is left?

Challenge 3: Mixed Word Problem

A football team lost 5 matches (counted as -3 points per loss) and won 7 matches (counted as +2 points per win). What is the team’s final point total?

🔁 Recap

Well done! 🏆

In this revision, you practised how to:

• Handle whole number operations correctly,
• Work easily with positive and negative integers, and
• Add, subtract, multiply, and divide fractions like a pro!

Practicing mixed questions like these prepares you for any BECE math challenge! 💪🧠

🪞 Reflection Prompt

Which part of Module 2 do you feel most confident in — whole numbers, integers, or rational numbers?

Which one would you like to keep practicing to get even better? 🚀