MALT©2006 Maths/Fractions Slide Show : Lesson 6 Fractions Lesson 6 Adding Fractions Part 1.

MALT©2006 Maths/Fractions Slide Show : Lesson 6

Fractions Lesson 6Adding Fractions

Part 1


WALT : add fractions of the

same denominator.

14

14+



same denominator.

15

35+

38

28

+

Read aloud this sum

38

28

+

The fractions have the same

denominatoreighths

38

28

+

Three eighths add two eighthsequals five eighths.

eighths

38

28

+

Three eighths add two eighthsequals five eighths.

eighths

58

47

27

+

Four sevenths add two sevenths equals six fourteenths.

614

Is this correct ?Who can explain why it’s wrong ?

47

27

+

It’s wrong because sevenths arebeing added.

614

So the answer must bein sevenths.

47

27

+

Four sevenths add two seventhsequals six sevenths.

67

The answer must be insevenths.

O.K. some for you to try.

You can discuss these with a friend.

Thinking time starts now !

4 + 17 7

4 + 38 8

3 + 26 6

2 + 59 9

The answers.

4 + 17 7

4 + 38 8

3 + 26 6

2 + 59 9

57

56

79

78

15

35

+

Read aloud this sum

1

15

35

+

These fractions can be addedbecause they have the same

denominator

1fifths

15

35

+

So think about it like this….

1

One whole…………… addone fifth …………… addthree fifths ……………

equals

15

35

+

So think about it like this….

1

One whole…………… addone fifth …………… addthree fifths ……………

equals

145

One and four fifths




4 + 17 7

4 + 38 8

3 + 26 6

2 + 59 9

1

1

1

2

The answers

4 + 17 7

4 + 38 8

3 + 26 6

2 + 59 9

1

1

1

2

1 1

2 179

57

78

56

78

38

+

Yes we can because they areboth eighths.

eighths

How about these factions.Can we add these together ?

78

38

+

How many eighths altogether ?

10 8

78

38

+

How many eighths altogether ?

10 8

This is the right answerbut it is written as an improper fraction.

78

38

+

What is ten eighths as a mixed number?

10 8

This is the right answerbut it is written as an improper fraction.

78

38

+ 10 8

281

We change this improper fraction into a mixed number.

78

38

+ 10 8

281 11

4

We then simplify this fraction to get this answer.

78

38

+ 10 8

281 11

4

Any questions or comments about this bit ?

78

38

+ 10 8

281 11

4

Eighths, how many ?

78

38

+ 10 8

281 11

4

Eighths, how many ? ten

78

38

+ 10 8

281 11

4

Or see them as one whole and two eighths.

78

38

+ 10 8

281 11

4

Any questions or comments about this bit ?

78

38

+ 10 8

281 11

4

equals




4 + 57 7

4 + 36 6

3 + 24 4

4 + 79 9 1

Here come the answers !

O.K. the answers.

4 + 57 7

4 + 36 6

3 + 24 4

4 + 79 9 1

27

29

16

141

1 1

1


end of slideshow


follow up tasks

textbook page 40

symmetry games

card games


same denominator.

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