Key idea:

1
Key idea To be able to multiply a number by 10,
100 and 1000
What
Im
Looking
For
WILF
Children who can multiply by 10, 100 and 1000,
then say or write the new number they have made.
2
In the decimal system, the number in each column
is 10 times bigger than the number to its right.
Th h t u
1 1 1 1
3
In the decimal system, the number in each column
is 10 times bigger than the number to its right.
Th h t u
1 1 1 1
4
If we multiply any digit by ten it will move into
the next column
x10
Th h t u
6
6
5
Lets look at another number
Th h t u
2 3

23 x 10 230
6
Lets try these together!
48 x 10 93 x 10 134 x 10 256 x 10 889 x
10
480
930
1,340
2,560
8,890
Write the answers on your whiteboards
7
If we multiply 6 by a hundred it will move up two
columns
Th h t u
6
6
8
Lets try these together!
800
8 x 100 15 x 100 28 x 100 134 x 100 267 x
100
1,500
2,800
13,400
26,700
Write the answers on your whiteboards.
9
If we multiply 6 by a thousand it will move up
three columns
x1000
Th h t u
6
6
10
Lets try these examples!
9,000
9 x 1000 13 x 1000 64 x 1000 149 x 1000
352 x 1000
13,000
64,000
149,000
352,000
Write the answers on your whiteboards.
11
Now you are going to try some yourselves! Youre
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.
12
Time for some more brain training, but this time
were multiplying by 100!
Remember WILF Children who can multiply by 100
and then say or write the new number they have
made.
13
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.
14
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.
15

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TIMES UP!
TIMES UP!
76
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.