Equal expressions + Terms and coefficients

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 2

Good morning!

Schedule: 

• Learning goals 
• Vocabulary 
• Notation
• Homework/worksheets
• Terms and coefficients 
• Equal expressions 

Learning goals 

At the end of this lesson I can:

• Use the correct key words to describe expressions
• Write equal algebraic expressions with fewer terms

Vocabulary
Ex: sum = +

Notation

- Use ⋅ for multiplication not x when working with algebra

Why? 

Notation

- Use ⋅ for multiplication not x when working with algebra

Why? 

-          x ⋅ 2 = 2⋅x =2x

Why?

Homework check

Starter

Consider the expression: 

x - 2y + 8

a) Write down the terms of this expression

b) Write down the constant(s) of this expression

c) Write down the coefficients of x and y

Starter

Consider the expression: 

x2 + 2x + 3y + y - 4x + 3

d) Write down the  like terms of this expression

e) Write down an equal algebraic expression with fewer terms

Starter

Consider the expression: 

x - 2y + 8

a) x,  -2y,    8  are the terms

b) The constant is 8

c) The coefficient of x  is 1, the coefficient of y is -2

Starter

Consider the expression: 

x2 + 2x + 3y + y - 4x + 3

d) 2x and -4x are like terms

3y and y are like terms

e) x2 + 2x + 3y + y -4x + 3 = -2x + 4y + 3

What to do

Open this LessonUp on your device. 

Work on the slides with the appropriate color: 

- Got the question right                               I really want a challenge!

- Got the question right                               I think a bit more practice will help me!

- Got the question incorrect/correct     I think more practice will help me! I                                                                                         would like some more help. 

Equivalent expressions

1 ball

b balls

Example 1

3b + 5 - b -1

+

-

-

Example 1

3b + 5 - b -1 = 

= 2b + 4

+

Example 2

2b + 1 + 3b + 4 - b = 

+

+

+

-

= 

Example 2

2b + 1 + 3b + 4 - b = 5b +5

+

Example 3

x + 3y - 2x2 + 1 +3x - y = 

Example 3

x + 3y - 2x2 + 1 +3x - y = 

x + 3x + 3y -y -2x2 + 1 = 

Example 3

x + 3y - 2x2 + 1 +3x - y = 

x + 3x + 3y -y -2x2 + 1 = 

4x + 2y -2x2 + 1 =

Extra practice + help

p. 163-165: 8F          1, 2, 3, 5     

Extra practice 

p. 163-165: 8F            4, 5, 6, 

p. 166: 8F                     Discussion 

Challenging work 

Go to ManageBac: 

Files: 

Unit 3: 

"Equivalent expressions worksheet" 

"Forming equations worksheet in depth"