Key idea:
To be able to multiply a number by 10, 100 and
1000
What I’m Looking For
Hi, I’m Wilf,
pleased to
meet you!
WILF: Children who can multiply
by 10, 100 and 1000,
then say or write the new
number they have made.
x10
Th
1
x10
h
1
x10
t
1
u
1
In the decimal system, the
number in each column is 10
times bigger than the number
to its right.
If we multiply any digit by ten it will move into
the next column
x10
Th
h
t
u
6
6
0
We must put a 0 in the empty units column to hold the
place so 6 x 10 = 60
Let’s look at another number
x10
Th
x10
h
t
u
2
2
3
3
0
Then we must remember to put the zero in to
the hold the digits in place!
23 x 10 = 230
Let’s try these together!
48 x 10 =
480
93 x 10 =
930
134 x 10 =
1,340
256 x 10 =
2,560
889 x 10 =
8,890
Write the answers
on your whiteboards
If we multiply 6 by a hundred it will move up
two columns
X 100
Th
h
6
t
u
0
6
0
We must put a 0 in the empty columns to hold the place –
6 x 100 = 600
Let’s try these together!
8 x 100 =
800
15 x 100 =
1,500
28 x 100=
2,800
134 x 100 = 13,400
267 x 100 = 26,700
Write the answers
on your whiteboards.
If we multiply 6 by a thousand it will move up
three columns
x1000
Th
6
h
0
t
u
0
6
0
We must put a 0 in the empty columns to hold the place –
6 x 1000 = 6000
Let’s try these examples!
9 x 1000 =
9,000
13 x 1000 =
13,000
64 x 1000=
64,000
149 x 1000 = 149,000
352 x 1000 = 352,000
Write the answers
on your whiteboards.
Now you are going to try some yourselves!
You’re going to do some brain training with your
partner.
Remember WILF: Children
who can multiply by 10 then
say or write the new
number they have made.
Time for some more brain training, but this
time we’re multiplying by 100!
Remember WILF: Children
who can multiply by 100
and then say or write the
new number they have
made.
Now try multiplying by 1000 with your partner
Remember WILF: Children
who can multiply by 1000
then say or write the new
number they have made.
Now try to see if you can improve your score. Can
you try the last column on the sheet?
Remember WILF: Children
who can multiply by 10, 100
and 1000 then say or write
the new number they have
made.
1 : 00
0 : 59
0 : 58
0 : 57
0 : 56
0 : 55
0 : 54
0 : 53
0 : 52
0 : 51
0 : 50
0 : 49
0 : 48
0 : 47
0 : 46
0 : 45
0 : 44
0 : 43
0 : 42
0 : 41
0 : 40
0 : 39
0 : 38
0 : 37
0 : 36
0 : 35
0 : 34
0 : 33
0 : 32
0 : 31
0 : 30
0 : 29
0 : 28
0 : 27
0 : 26
0 : 25
0 : 24
0 : 23
0 : 22
0 : 21
0 : 20
0 : 19
0 : 18
0 : 17
0 : 16
0 : 15
0 : 14
0 : 13
0 : 12
0 : 11
0 : 10
0 : 09
0 : 08
0 : 07
0 : 06
0 : 05
0 : 04
0 : 03
0 : 02
0 : 01
0 : 00
TIME’S
UP!
TIME’S
UP!
How did you do today? Can you remember the
rules for multiplying by 10, 100 and 1000?
Remember WILF: Children
who can multiply by 10, 100
and 1000 then say or write
the new number they have
made.