Menu
Home Page

Maths

18/01/21

 

Today we are going to look at Multiplying and dividing by 10, 100 and 1000.

 

First lets start of with a multiplying.

 

Our number

 

568

 

First, we want to find out what 568 x 10 =

 

To do this we move the digits of the number 1 place to the left.

 

568 x 10 = 5,680

 

Next, we want to find out what 568 x 100 =

 

To do this we move the digits of the number 2 place to the left.

 

568 x 100 = 56,800

 

 

Finally, we want to find out what 568 x 1000 =

 

To do this we move the digits of the number 3 place to the left.

 

568 x 1000 = 568,000

 

 

It is important to remember we are not just adding a 0 to the end of the number as you will see in the next example. make sure too notice the decimal point.

 

Our number

 

7.654

 

First, we want to find out what 7.654 x 10 =

 

To do this we move the digits of the number 1 place to the left.

 

7.564 x 10 = 76.54

 

Next, we want to find out what 7.564 x 100 =

 

To do this we move the digits of the number 2 place to the left.

 

7.564 x 100 = 765.4

 

 

Finally, we want to find out what 568 x 1000 =

 

To do this we move the digits of the number 3 place to the left.

 

7.564 x 1000 = 7654.

 

 

Now lets move onto dividing.

 

Our number

 

6458

 

First, we want to find out what 6458 ÷ 10 =

 

To do this we move the digits of the number 1 place to the right.

 

6458 ÷ 10 = 645.8

 

Next, we want to find out what 6458 ÷ 100 =

 

To do this we move the digits of the number 2 place to the right.

 

6458 ÷ 100 = 64.58

 

Finally, we want to find out what 6458 ÷ 1000 =

 

To do this we move the digits of the number 3 place to the right.

 

6458 ÷ 1000 = 6.458

 

Lets have a look at another example.

 

Our number

 

54.96

 

First, we want to find out what 54.96 ÷ 10 =

 

To do this we move the digits of the number 1 place to the right.

 

54.96 ÷ 10 = 5.496

 

Next, we want to find out what 6458 ÷ 100 =

 

To do this we move the digits of the number 2 place to the right.

 

54.96 ÷ 100 = 0.5496

 

Finally, we want to find out what 6458 ÷ 1000 =

 

To do this we move the digits of the number 3 place to the right.

 

54.96 ÷ 1000 = 0.05496

 

Using what you know now, go onto Purple mash and complete the 2do that has been set. Mr Hindman is always on Purple Mash for you to email and ask for help.

Top