Year 5 LBH
Orange and Yellow
Year 5 LBH
Blue and Green
L.O
L.O
a) I can double or halve any number up to 100
a) I can double or halve any number up to 100
b) and multiples of 100 up to 10,000.
b) and multiples of 100 up to 10,000.
Practise with these numbers. Remember
Practise with these numbers. Remember
there may be halves in your answers.
there may be halves in your answers.
a)Double or halve numbers to 100
a)Double or halve numbers to 100
78
16
86
45
23
78
16
86
45
23
54
19
74
63
51
54
19
74
63
51
48
65
25
41
63
48
65
25
41
63
b) Double or halve multiples of 100 to 1000
b) Double or halve multiples of 100 to 1000
150
200
850
350
500
150
200
850
350
500
450
50
650
700
950
450
50
650
700
950
850
450
150
400
600
850
450
150
400
600
OPTIONAL BONUS: Use Place Value to
carefully solve these
c) Double or halve decimals
0.15
1.2
3.9
0.3
10.4
0.8
0.17
0.78
0.9
0.61
USE JOTTINGS IN YOUR BOOK IF YOU NEED TO
Year 5 LBH
Red+
L.O. I can double and halve numbers to 100
You need to be able to quickly double or
halve numbers in your head.
Tip: If you can’t recall the answer quickly,
then PARTITION the number, then deal
with the tens and then units separately, then
put them back together. You may need to
make JOTTINGS for this.
For example:
17 doubled
double 10
20
double 7
14
20 + 14 = 34
Practise doubling these numbers:
50
12
25
31
45
24
13
41
35
43
25
12
Feeling confident? Try these;
16
34
60
46
32
18
51
70
81
29
38
47
Practise halving these numbers:
20
46
100 50
70
66
80
84
44
86
30
32
Feeling confident? Try these:
32
56
102 78
58
34
72
90
88
62
74
26
Year 5 LBH
Red
L.O. I can double and halve numbers to 20
You need to be able to quickly double or
halve numbers in your head.
Practise doubling these numbers:
1
5
3
4
8
2
9
10
20
50
Practise halving these numbers:
10
8
12
6
20
14
2
16
4
18
30
100
For example:
17 doubled
double 10
20
double 7
14
20 + 14 = 34
7
22