t2-m-17110-year-3-add-and-subtract-fractions-maths-mastery-powerpoint-english_ver_2.ppt

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2. Adding Fractions
Ruby has drawn a representation of a fraction.
What pairs of fractions can be added
together to make this fraction?

3. Adding Fractions (Answers)
+ =
3
5
1
5
4
5
+ =
2
5
2
5
4
5
+ =
1
5
3
5
4
5

4. More Adding Fractions
Ruby says, “I can draw other representations
of fractions and use them to illustrate the
addition of two fractions.”
Draw some shapes, equally
divided into parts, and use these
to model the addition of two
fractions.
Compare and check your
ideas with a partner.

5. Subtracting Fractions
Mohammed has drawn a representation
of a fraction using a number line.
Show how this number line can be used to subtract
one fraction from another, so the answer is 3/8?
Share your ideas with a partner.
What differences are there in your
ideas?
0
1
8
2
8
3
8
4
8
5
8
6
8
7
8
1

6. Subtracting Fractions (Answers)
– =
7
8
4
8
3
8
– =
6
8
3
8
3
8
– =
5
8
2
8
3
8
– =
4
8
1
8
3
8
0
1
8
2
8
3
8
4
8
5
8
6
8
7
8
1
0
1
8
2
8
3
8
4
8
5
8
6
8
7
8
1
0
1
8
2
8
3
8
4
8
5
8
6
8
7
8
1
0
1
8
2
8
3
8
4
8
5
8
6
8
7
8
1
- 0 is also correct
3
8

7. Mohammed says, “I can draw other number
lines with fractions and use them to
illustrate the subtraction of two fractions.”
More Subtracting Fractions
Draw some number lines and use these
to model the subtraction of two fractions.
Compare and check your ideas with a
partner.