1. 1
4
2
4
+
Read this sum out loud.
Do these fractions have the same
denominator?

2. 1
4
2
4
+
The fractions have the same
denominator
quarters

3. 1
4
2
4
+ =
?
?

4. 1
4
2
4
+
One quarter plus two quarters
equals three quarters.
quarters
3
4
=

5. 3
8
2
8
+
Read this sum out loud.
Do these fractions have the same
denominator?

6. 3
8
2
8
+
The fractions have the same
denominator
eighths

7. 3
8
2
8
+ =
?
?

8. 3
8
2
8
+
Three eighths plus two eighths
equals five eighths.
eighths
5
8
=

9. 4
7
2
7
+
Four sevenths plus two sevenths
equals six fourteenths.
6
14
Is this correct ?
Who can explain why it’s wrong ?
=

10. 4
7
2
7
+
It’s wrong because sevenths are
being added.
6
14
So the answer must be
in sevenths.

11. 4
7
2
7
+ =
?
?

12. 4
7
2
7
=
Four sevenths plus two sevenths
equals six sevenths.
6
7
The answer must be in
sevenths because the denominator
stays the same!
+

13. Now it’s time for you to try some.
You can discuss these with a friend.
Thinking time starts now !
3
6
1
6
2
9
5
9
4
7
1
7
4
8
3
8
?
?
?
?
?
?
?
?
+
+
+
+
=
=
=
=

14. The answers.
How did you do?
3
6
1
6
2
9
5
9
4
7
1
7
4
8
3
8
4
6
5
7
7
9
7
8
+
+
+
+
=
=
=
=