# lesson 1 THV2

Fractions

Keywords: common denominator, improper fractions, mixed number.
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Slide 1: Tekstslide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 2

In deze les zitten 18 slides, met interactieve quizzen en tekstslides.

## Onderdelen in deze les

Fractions

Keywords: common denominator, improper fractions, mixed number.

#### Slide 1 -Tekstslide

Write each of these fractions in their simplest form.

#### Slide 2 -Tekstslide

If the fractions have different denominators, you must first write them as equivalent fractions with a common denominator

Calculate
⅕ + ⅗
A
B
4/10
C
D
4/25

#### Slide 4 -Quizvraag

Calculate and cancel down to its lowest terms.
⅝ - ⅛

A
4/6
B
1/8
C
4/8
D
1/2

#### Slide 5 -Quizvraag

Which of these are improper fractions?
A
17/18
B
9/2
C
1/2
D
2/9

#### Slide 6 -Quizvraag

Which fraction is bigger?

A
3 ¼
B
15/4
C
9/2
D
7/2

#### Slide 7 -Quizvraag

Write these as a mixed number
17/3
A
1 ⅔
B
6 ⅓
C
2 ⅓
D
5 ⅔

Calculate

2 ⅓ - 1 ½

A
1 ⅓
B
7/9
C
D

#### Slide 9 -Quizvraag

Multiplying fractions

#### Slide 10 -Tekstslide

Calculate and cancel down to its lowest terms.
⅜ × ⅖
A
6/40
B
3/20
C
15/16
D
3/4

#### Slide 11 -Quizvraag

Calculate and cancel down to its lowest terms.
6 × ⅔
A
12/18
B
12/3
C
4
D
2/18

#### Slide 12 -Quizvraag

Reciprocals
Two numbers are reciprocals if their product is 1.
6/5 is the reciprocal of  5/6
1/7 is the reciprocal of ........
-3/4 is the reciprocal of ........

#### Slide 13 -Tekstslide

Dividing by a fraction
Dividing by a fraction is the same as multiplying by its reciprocal.
a) 3/8 ÷  1/2

b) 8 ÷ (- 3/4 )

c) - 3 ¼ ÷ (-1/4)

#### Slide 14 -Tekstslide

Algebraic products
1.  Multiply the numbers and write the product first.
2. Then write the letters in alphabetical order, without the dot.

- 7a × 4b

#### Slide 15 -Tekstslide

Like terms
Simplify
a) 3x + 7 - 2x + 5
b) 5a - 11 + a - 3
c) 8y - 6x - 4y -2

#### Slide 16 -Tekstslide

The order of operations with algebra
a) 3x × 4y + 5x × 6y
b) 2a× 8b - 5b × 6a
c) 2a × 5b + 2a ×(-8b)

#### Slide 17 -Tekstslide

The distributive property a(b+c)=ab+ac

Simplify:
a) 4b(6a -3)

b) -3( 2xy - 5y)

c) -5(2x -4y) - 2(x +4y)