converting units

Joanne Smithies Our Lady & St. Gerards RCP

We use different metric units to measure :-

We can use our knowledge of multiplying and dividing by 10, 100 or 1000 to change or convert measurements in one unit to measurements in

another unit.

We are going to use our knowledge We are going to use our knowledge about multiplying and dividing by 100 about multiplying and dividing by 100 to convert centimetres to metres and to convert centimetres to metres and

to convert metres to centimetres.to convert metres to centimetres.

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 0 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 0 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimetres in 1 metreWhen we change from cm to m we divide by:-

Remember!When we divide by 100 the units move two places to the right.

H T U th hth th

4 2 7 0 ÷100

This is how we change 427cm into metres:-

Therefore:-Therefore:-

427cm = 4.27m427cm = 4.27mH T U t h th

3 2 6

H T U t h th

3 2 6

H T U t h th

4 7 6

H T U t h th

1 6 5 3

H T U t h th

0 4 7 6

H T U t h th

1 6 5 3

÷100÷100

÷100÷100

÷100÷100

cmcm mm

354cm354cm

15.4cm15.4cm

779cm779cm

52.4cm52.4cm

939cm939cm

395cm395cm

25.8cm25.8cm

3.54m3.54m

0.154m0.154m

7.79m7.79m

0.524m0.524m

9.39m9.39m

3.95m3.95m

0.258m0.258m

÷10÷1000

Convert from centimetres to metresConvert from centimetres to metres

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m =

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m =

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m =

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m =

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m =

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m =

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m =

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m =

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m =

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m =

To change from metres to centimetres To change from metres to centimetres we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move When we multiply by 100 we move each digit two places to the left:-each digit two places to the left:-

H T U t h th

3 5 1

3.51m = 3.51m = 351cm351cm

5.4m5.4m

6.2m6.2m

12.7m12.7m

3m3m

7.6m7.6m

0.54m0.54m

0.3m0.3m

540cm540cm

620cm620cm

1270cm1270cm

300cm300cm

760cm760cm

54cm54cm

30cm30cm

x100x100

Try changing these measurements in metres into Try changing these measurements in metres into centimetrescentimetres