1. To be able to multiply a number by 10, 100 and 1000
Key idea:
To be able to multiply a number by 10, 100 and 1000

2. x10
x10
x10 Th h t o 1
In the decimal system, the number in each column is 10 times bigger than the number to its right.

3. If we multiply any digit by ten it will move into the next column6
We must put a 0 in the empty units column to hold the place so 6 x 10 = 60

4. Let’s look at another number
x10 2
x10 3 Th h t u 2 3
Then we must remember to put the zero in to the hold the digits in place!
23 x 10 = 230

5. Let’s 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

6. 6 Th h t o If we multiply 6 by a hundred it will move up two columns
X 100 Th h t o 6
We must put a 0 in the empty columns to hold the place – 6 x 100 = 600

7. Write the answers on your whiteboards.
Let’s 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.

8. If we multiply 6 by a thousand it will move up three columns
x1000 Th h t u 6
We must put a 0 in the empty columns to hold the place – 6 x 1000 = 6000

9. Let’s 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