Transcript Fractions

Fractions
What is 1 of £32?
2
What is 1 of £32?
2
Answer: £16
What is 1 of £32?
4
What is 1 of £32?
4
Answer: £8
What is 3 of £32?
4
What is 3 of £32?
4
Answer: £24
What is 3 x 32?
4
What is 3 x 32?
4
Answer: 24
So
3 of 32
4
3 x 32
4
is the same as
How do we multiply
fractions?
2
3
x
x
5 =
6
How do we multiply
fractions?
x
2
3
x
x
5 =
6
How do we multiply
fractions?
x
2
3
x
x
5 = 10
6
How do we multiply
fractions?
x
2
3
x
x
x
5 = 10
6
How do we multiply
fractions?
x
2
3
x
x
x
5 = 10
6
18
How do we multiply
fractions?
x
2
3
x
x
x
5 = 10 = 5
6
18 9
Work out this example
8
9
x
x
7 =
10
Work out this example
8
9
x
x
7 =
10
54
Work out this example
8
9
x
x
7 = 54
10
90
Work out this example
8
9
x
x
7 = 54 = 27
10
90
45
Answer these questions in
your books (10 mins)
1. 1 of 49m
2
4. 5 x 12
24
2. 2 of 21g
3
5. 3 x 8
7 10
3. 3 of 110 days
10
6. 9 x 4
11 5
Multiplying mixed numbers
and fractions
3
1
5
x
x
3 =
4
Remember to convert mixed
numbers to top heavy fractions
3
1
5
=
Remember to convert mixed
numbers to top heavy fractions
3
x
1
5
=
Remember to convert mixed
numbers to top heavy fractions
3
1
5
x
1. Times the denominator
by the whole number
=
Remember to convert mixed
numbers to top heavy fractions
3
1
5
x
1. Times the denominator
by the whole number
(In this case we get 5x3=15)
=
Remember to convert mixed
numbers to top heavy fractions
+
3
1
5
x
1. Times the denominator
by the whole number
(In this case we get 5x3=15)
=
Remember to convert mixed
numbers to top heavy fractions
2. Add the product to the numerator
+
3
1
5
x
1. Times the denominator
by the whole number
(In this case we get 5x3=15)
=
Remember to convert mixed
numbers to top heavy fractions
2. Add the product to the numerator
(So 15+1=16)
+
3
1
5
x
1. Times the denominator
by the whole number
(In this case we get 5x3=15)
=
Remember to convert mixed
numbers to top heavy fractions
2. Add the product to the numerator
(So 15+1=16)
+
3
1
5
x
1. Times the denominator
by the whole number
(In this case we get 5x3=15)
=
3. Put this number over the existing
denominator
Remember to convert mixed
numbers to top heavy fractions
2. Add the product to the numerator
(So 15+1=16)
+
3
1
5
x
1. Times the denominator
by the whole number
(In this case we get 5x3=15)
=
3. Put this number over the existing
denominator
(In this case the denominator is 5)
Remember to convert mixed
numbers to top heavy fractions
2. Add the product to the numerator
(So 15+1=16)
+
3
1
5
x
1. Times the denominator
by the whole number
(In this case we get 5x3=15)
=
16
5
3. Put this number over the existing
denominator
(In this case the denominator is 5)
Multiplying mixed numbers
and fractions
3
1
5
x
x
3 =
4
Multiplying mixed numbers
and fractions
3
1
5
x
x
16 x
5
3 =
4
Multiplying mixed numbers
and fractions
3
1
5
x
x
3 =
4
16 x 3 =
5
4
Multiplying mixed numbers
and fractions
3
1
5
x
x
3 =
4
16 x 3 = 48
5
4
20
Multiplying mixed numbers
and fractions
3
1
5
x
x
3 =
4
16 x 3 = 48 = 12
5
4
20
5
Multiplying mixed numbers
and fractions
3
1
5
x
x
3 =
4
16 x 3 = 48 = 12
5
4
20
5
=
2
2
5
Answer these questions in
your books (10 mins)
1.
2
1 X 3
3 X 4
2.
1
2
5
X
X
2
3
4
1
3.
5
7
X
X
4.
1
5 X
8 X
3
4
4
Mixed Exercise
(15 mins)
1.
5
2.
3.
1
3
X
X
24
1
4.
2 x 11
9 x 12
2 + 4
7 + 7
5.
2 +3
11 + 5
5 - 7
8+ 12
6.
1 - 1
2+ 5