1TH/Vwo Ch7 Fractions

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

FRACTIONS

What are fractions?

How to deal with those little fellows?

You will be doing +, -, x and even :

with fractions.

Take a pen/pencil and a piece of paper. You will need it!

§7.3  and  §7.4 Fractions

This lesson up includes all operations with fractions:

          +        -        x      and even     :      (not in this book)

It also deals with the words 'numerator' and 'denominator' and 

offers you a song!

What is a fraction?

Calculate and simplify
2/3 + 3/4 =

1. 1 5/7
2. 17/12
3. 19/12
4. 1 5/12

Explanation previous task:

2/3 + 3/4 =

8/12 + 9/12=

17/12=

1   5/12

Calculate 4/5 - 1/2 =

1. 3/5
2. 3/3
3. 1
4. 3/10

Explanation previous task:

4/5 - 1/2=

8/10 - 5/10=

3/10

What is the name for 8 in 8/9 ?

1. fraction
2. denominator
3. numerator
4. number

What is the name for 6 in 5/6 ?

1. numerator
2. provider
3. terminator
4. denominator

After this great song ...

There is  more to Fractions than adding and subtracting.

Like:

multiplying and also dividing

See next slides!

Calculate:
4/5 x 2/3 =

Next dividing fractions is explained.

For your good understanding this first:

the reciprocal = het omgekeerde

For example:         is the reciprocal of          

​3​​4​​

​4​​3​​

Calculate and simplify:
5/6 : 3/4 =

Explanation:

5/6  :  3/4 =

5/6  x  4/3 =

20/18 =

10/9 =

1  1/9

:            = ...........

This final task is no piece of cake!

A few tips:

1st make the two numbers into two fractions

2nd remember that dividing fractions asks for multiplying by

   the reciprocal (=omgekeerde)!

11​4​​1​​

2​4​​1​​

Calculate and symplify:
1 1/4 : 2 1/4 =

1. 9/5
2. 5/9
3. 1 4/5
4. 2 1/5

Explanation final task:

1  1/4  :   2   1/4  =

5/4  :  9/4  =

5/4   x  4/9  =

20/36  =

5/9

My understanding
of fractions
on a scale of 1 to 10.

Homework:

Make complete in your Notebook: §7.1  t/m   §7.4

Correct your work.

Send in the paragraphs you didn't send in yet, on GC.

Finished all this?

Choose and make a few SUPPORT or CHALLENGE exercises from

§7.1  t/m  §7.4.