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## Mr Mattock

on 9 April 2016

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#### Transcript of Add and Subtract Fractions

Starter

(a) 3 tens plus 4 tens

(b) 7 thousands subtract 5 thousands

(c) 5 ninths add 2 ninths

(d) 13 fifteenths takeaway 7 fifteenths.
3 7
8 8
What fraction sums are shown. What are the answers?
Starter

(a) 3 tens plus 4 tens =
7 tens

(b) 7 thousands subtract 5 thousands =
2 thousands

(c) 5 ninths add 2 ninths =
7 ninths

(d) 13 fifteenths takeaway 7 fifteenths =
6 fifteenths
Add and subtract fractions with a common denominator, using mixed numbers where necessary.
What fraction calculations are shown. What are the answers?
3 4 7 2
5 5 5 5
+ = = 1
11 3 8 4
14 14 14 7
- = =
1 7 5 2 1
6 6 6 6 3
1 = - = =
2 5
9 9
1 -
2 + 1
2 4
5 5
+
3 7
8 8
2 5
9 9
1 -
2 + 1
2 4
5 5
+
1 = 1
6 2
9 3
4
=
2 1
8 4
1
5
Main Activity
Main Activity
Plenary
Can you see the best way to do these?

3 1 5 7
8 8 8 8
+ + +
2 - + 1
2
7
4
7
5
7
Key
Examples

Activities
Activity