Equivalent fractions

Equivalences

1. Fractions Lesson 3
Understanding
equivalent fractions
An interactive Qwizdom lesson

2. These numbers are called
fractions
1
2
3
15
5
6
2
3
4
7
12
22

3. Today’s lesson looks at
Equivalent
fractions
3
4
6
8

4. WALT : to understand
equivalent fractions and
decide if fractions are equal
3
4
6
8

5. In the word equivalent
there is the root word
equal
3
4
6
8

6. Fractions which are said to
be equivalent are equal to
each other.
3
4
6
8

7. For example
1
2
2
4

8. So if you were given 2 quarters
of a cake and your friend was
given half a cake would you both
have the same amount?
1
2
2
4

9. Yes!
These fractions are equal.
1
2
2
4
These are equivalent fractions.

10. Can you tell if the following
fractions are equal?
Are they equivalent
fractions?
1
2
3
6

11. Yes these fractions are
equal.
They are equivalent
fractions.
1
2
3
6

12. Are they equivalent
fractions?
2
3
4
6

13. Yes they are
equivalent fractions.
2
3
4
6

14. Are they equivalent
fractions?
1
4
3
12

15. Yes they are
equivalent fractions.
1
4
3
12

16. Are they equivalent
fractions?
1
3
2
5

17. No, they are not equal.
They are not equivalent
fractions.
1
3
2
5

18. Here are some equivalent
fractions.
Can you work out a strategy
for deciding whether they
are equal?
1
4
2
8

19. Here are some equivalent
fractions.
Can you work out a strategy
for deciding whether they
are equal?
2
5
4
10

20. Here are some equivalent
fractions.
Can you work out a strategy
for deciding whether they
are equal?
1
3
3
9

21. Use thinking time to discuss.
3
12
1
4

22. Use thinking time to discuss.
1
2
5
10

23. What ideas have you come
up with?
1
2
5
10

24. Explain your
strategy to the class.
1
2
5
10

25. There is a relationship
between the fractions using
dividing and multiplying.
1
4
5
20

26. What ever you do to
the top number . .
You must do to the
bottom number.
1
4
5
20

27. What ever you do to the top
number . . You must do to the
bottom number.
1
5
5
20
divide by 5
divide by 5

28. What ever you do to the top
number . . You must do to the
bottom number.
1
2
2
4
divide by 2
divide by 2

29. What ever you do to the top
number . . You must do to the
bottom number.
1
4
3
12
divide by 3
divide by 3

30. What ever you do to the top
number . . You must do to the
bottom number.
1
5
4
20
divide by 4
divide by 4

31. What ever you do to the top
number . . You must do to the
bottom number.
1
4
2
8
divide by 2
divide by 2

32. What ever you do to the top
number . . You must do to the
bottom number.
9
15
3
5
multiply by 3
multiply by 3

33. What ever you do to the top
number . . You must do to the
bottom number.
4
18
2
9
multiply by 2
multiply by 2

34. What is the missing number?
2
10
1
5
Click for answer

35. What is the missing number?
2
4
4
8
Click for answer

36. What is the missing number?
4
5
32
40
Click for answer

37. Sometimes you might need to work
out equivalent fractions in
three steps.
6
8

48
64
3
4

Divide by 8
Divide by 8
Divide by 2
Divide by 2

38. Sometimes you might need to work
out equivalent fractions in
three steps.
6
10

48
80
3
?

Divide by 8
Divide by 8
Divide by 2
Divide by 2
What is the
missing
number?
Click for answer
5

39. Sometimes you might need to work
out equivalent fractions in
three steps.
6
10

48
80
3
?

Divide by 8
Divide by 8
Divide by 2
Divide by 2
What is the
missing
number?
Click for answer

40. LO: To revise work equivalent fractions
I understand these ideas fully.
I have some understanding but
I need more practice.
I don’t understand these ideas at
all and need to work again on this
unit of work.
A
B
C

41. End of slide showEnd of slide show