# Building expressions + Product notation

Good morning!
Schedule:
• Learning goals
• Starter
• Building expressions
• Vocabulary
1 / 28
Slide 1: Slide
WiskundeMiddelbare schoolvwoLeerjaar 2

This lesson contains 28 slides, with interactive quiz and text slides.

## Items in this lesson

Good morning!
Schedule:
• Learning goals
• Starter
• Building expressions
• Vocabulary

#### Slide 1 -Slide

Learning goals
At the end of this lessons I can:
• Build an algebraic expression from a word problem
• Use the correct product notation in algebraic expressions

#### Slide 2 -Slide

Starter
Translate into equations, and solve.

When a number is decreased by 3 and the result is doubled, the answer is equal to the original number. Find the number

#### Slide 3 -Slide

What is the number?

#### Slide 4 -Open question

Build the expression
When a number is decreased by 3 and the result is doubled, the answer is equal to the original number. Find the number
Number = x

Equation:

( x - 3 ) ⋅ 2 = x

#### Slide 5 -Slide

Solve equation
When a number is decreased by 3 and the result is doubled, the answer is equal to the original number. Find the number
Equation:

( x - 3 ) ⋅ 2 = x
2 (x - 3) = x
2x - 6 = x
x - 6 = 0
x = 6

#### Slide 6 -Slide

Vocabulary
Increased = more than
Decreased = less than
Sum
Difference
Double
Treble
Integer
Consecutive
The result is = equals

+

#### Slide 7 -Slide

Vocabulary
Increased = more than
Decreased = less than
Sum
Difference
Double
Treble
Integer
Consecutive
The result is = equals

+
-

#### Slide 8 -Slide

Vocabulary
Increased = more than
Decreased = less than
Sum
Difference
Double
Treble
Integer
Consecutive
The result is = equals

+
-
+

#### Slide 9 -Slide

Vocabulary
Increased = more than
Decreased = less than
Sum
Difference
Double
Treble
Integer
Consecutive
The result is = equals

+
-
+
-

#### Slide 10 -Slide

Vocabulary
Increased = more than
Decreased = less than
Sum
Difference
Double
Treble
Integer
Consecutive
The result is = equals

+
-
+
-
⋅ 2

#### Slide 11 -Slide

Vocabulary
Increased = more than
Decreased = less than
Sum
Difference
Double
Treble
Integer
Consecutive
The result is = equals

+
-
+
-
⋅ 2
⋅ 3

#### Slide 12 -Slide

Vocabulary
Increased = more than
Decreased = less than
Sum
Difference
Double
Treble
Integer
Consecutive
The result is = equals

+
-
+
-
⋅ 2
⋅ 3
Whole number

#### Slide 13 -Slide

Vocabulary
Increased = more than
Decreased = less than
Sum
Difference
Double
Treble
Integer
Consecutive
The result is = equals

+
-
+
-
⋅ 2
⋅ 3
Whole number
Sequence: 1, 2, 3,
50, 51, 52

#### Slide 14 -Slide

Vocabulary
Increased = more than
Decreased = less than
Sum
Difference
Double
Treble
Integer
Consecutive
The result is = equals

+
-
+
-
⋅ 2
⋅ 3
Whole number
Sequence: 1, 2, 3,
50, 51, 52
=

#### Slide 15 -Slide

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.

#### Slide 16 -Slide

Extra practice
Example 1:
Translate and solve
When a number is increased by 5, the answer is 7

Vocab:
a number :
increased :

#### Slide 17 -Slide

Extra practice
Example 1:
Translate and solve
When a number is increased by 5, the answer is 7

Vocab:
a number : x

#### Slide 18 -Slide

Extra practice
Example 1:
Translate and solve
When a number is increased by 5, the answer is 7

Vocab:
a number : x

Equation
x + 5 = 7

#### Slide 19 -Slide

Extra practice
Example 1:
Translate and solve
When a number is increased by 5, the answer is 7

Vocab:
a number : x

Equation
x + 5 = 7
-5    -5
x + 0 = 2
x = 2

#### Slide 20 -Slide

Extra practice
Example 2:
Translate and solve
When a number is decreased by 3, the result is -1

Vocab:
a number :
decreased :
the result is :

Equation

#### Slide 21 -Slide

Extra practice
Example 2:
Translate and solve
When a number is decreased by 3, the result is -1

Vocab:
a number : x
decreased : subtracting (-)
the result is :  =

Equation
x - 3 = -1
+3   +3
x - 0 = 2
x = 2

#### Slide 22 -Slide

Extra practice
Example 3:
Translate and solve
The sum of two consecutive even integers is 78

Vocab:
an integer: x
Two consecutive even :  2, 4
is : =

Equation

#### Slide 23 -Slide

Extra practice
Example 3:
Translate and solve
The sum of two consecutive even integers is 78

Vocab:
an integer: x
Two consecutive even :  2, 4
is : =

Equation
x + (x + 2) = 78
2x + 2        = 78
- 2            - 2
2x               = 76
x                 = 38

#### Slide 24 -Slide

Extra practice

Go to ManageBac - Files - Unit 3 - " Forming equations worksheet in between "

#### Slide 25 -Slide

Challenge

Go to ManageBac  -  Files - Unit 3 - " Forming equations worksheet in depth "

#### Slide 26 -Slide

Extra challenge
I am a number: I am smaller than my half and larger than my double.