Key idea:

To be able to multiply a number by 10, 100 and 1000

WILF:

Hi, I’m Wilf, pleased to meet you!

What I’m Looking For

Children who can multiply by 10, 100 and 1000,

then say or write the new number they have made.

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

x10x10x10

Th h t u

66

x10

If we multiply any digit by ten it will move into the next column

We must put a 0 in the empty units column to hold the place so 6 x 10 = 60

0

Let’s look at another number

23 x 10 = 230

Th h t u

2 3

x10

2

x10

3Then we must remember to put the zero

in to the hold the digits in place!

0

Let’s try these together!

48 x 10 =

93 x 10 =

134 x 10 =

256 x 10 =

889 x 10 =

480

Write the answers on your whiteboards

930

1,3402,5608,890

Th h t u

66

If we multiply 6 by a hundred it will move up two columns

X 100

We must put a 0 in the empty columns to hold the place – 6 x 100 = 600

0 0

Let’s try these together!

8 x 100 =

15 x 100 =

28 x 100=

134 x 100 =

267 x 100 =

800

Write the answers on your whiteboards.

1,5002,800

13,400

26,700

Th h t u

66

If we multiply 6 by a thousand it will move up three columns

We must put a 0 in the empty columns to hold the place – 6 x 1000 = 6000

00 0

x1000

Let’s try these examples!

9 x 1000 =

13 x 1000 =

64 x 1000=

149 x 1000 =

352 x 1000 =

9,000

Write the answers on your whiteboards.

13,00064,000

149,000

352,000

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.

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TIME’SUP!

TIME’SUP!

TIME’SUP!

TIME’SUP!

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.