• What is a bar model?

• What are the different types of bar models?

Review

What do you think are the names of the parts of a mathematical expression?

A variable is a symbol that represents an unknown value,

Variable

A constant is a value that does not change.

Constant

A coefficient is a number that is multiplied by the variable.

Coefficient

Definition of Terms

A= 1, B= 2, C= 3, D= 4, and so on, up to Z= 26.

• Let us find the value of the word “MATH”.

Find: M+A+T+H

M+A+T+H = 13 + 1 + 20 + 8
= 14 + 20 + 8
= 34 + 8
M+A+T+H = 42

When I say “GO,” follow my hand signal to meet with your group and answer the following equations. Use voice level 1 in 5 minutes.

Using your iPads Scan the QR code to join the mentimeter activity.

​Activity 2: Evaluating Algebraic Expression

What do you think are the names of the parts of a mathematical expression?

As a Lasallian, how can you apply the concept of constants and variables in your daily life?

At home, identify things—such as a grocery bill, cellphone load, gas consumption, etc.—where an algebraic expression represents the relationship between values. Write an algebraic expression for your chosen scenario and evaluate it by substituting specific values for the variables. Finally, present your findings using an online tool like Google Slides or Canva.