: Solving multi-step text problems from the textbook . 💡 Tips for Students

: When multiplying large numbers, always look for "round" numbers like 10, 20, or 100 to make the mental math easier.

: Applying these properties to word problems involving cost, quantity, or distance. 📝 Typical Structure of the Lesson

In Lesson 40, students generally explore the (specifically regarding addition and subtraction) or continue mastering Multiplication of Multi-digit Numbers . 🔑 Key Learning Objectives