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.

CONVERTING DECIMALSTHINGS TO REMEMBER:

Multiply -- (the number gets larger)

Divide -- (the number gets smaller)

kilo- hecto- deka- meter . deci- centi- milli- gram Liter

Remember this mnemonic device to help you remember the order of the metric prefixes:

Kangaroos Hop Down Mountains Drinking Chocolate Milk

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 centimeters to meters and to convert centimeters to meters and

to convert meters to centimeters.to convert meters to centimeters.

There are 100 centimeters in 1 meterWhen we change from cm to m we divide by:-

Remember!When we divide by 100 we move the decimal two places to the left (the units move two places to the right).

H T O th hth th

4 2 7 0 0 0 ÷100

This is how we change 427cm into meters:-

There are 100 centimeters in 1 meterWhen we change from cm to m we divide by:-

Remember!When we divide by 100 we move the decimal two places to the left (the units move two places to the right).

H T O th hth th

4 2 7 0 0 0 ÷100

This is how we change 427cm into meters:-

There are 100 centimeters in 1 meterWhen we change from cm to m we divide by:-

Remember!When we divide by 100 we move the decimal two places to the left ( (the units move two places to the right).

H T O th hth th

4 2 7 0 0 ÷100

This is how we change 427cm into meters:-

There are 100 centimeters in 1 meterWhen we change from cm to m we divide by:-

Remember!When we divide by 100 we move the decimal two places to the left ( (the units move two places to the right).

H T O th hth th

4 2 7 0 ÷100

This is how we change 427cm into meters:-

There are 100 centimeters in 1 meterWhen we change from cm to m we divide by:-

Remember!When we divide by 100 we move the decimal two places to the left ( (the units move two places to the right).

H T O th hth th

4 2 7 0 ÷100

This is how we change 427cm into meters:-

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

Remember!When we divide by 100 we move the decimal two places to the left ( (the units move two places to the right).

H T O th hth th

4 2 7 0 ÷100

This is how we change 427cm into metres:-

There are 100 centimeters in 1 meterWhen we change from cm to m we divide by:-

Remember!When we divide by 100 we move the decimal two places to the left ( (the units move two places to the right).

H T O th hth th

4 2 7 0 ÷100

This is how we change 427cm into meters:-

There are 100 centimeters in 1 meterWhen we change from cm to m we divide by:-

Remember!When we divide by 100 we move the decimal two places to the left ( (the units move two places to the right).

H T O th hth th

4 2 7 0 ÷100

This is how we change 427cm into meters:-

There are 100 centimeters in 1 meterWhen we change from cm to m we divide by:-

Remember!When we divide by 100 we move the decimal two places to the left ( (the units move two places to the right).

H T O th hth th

4 2 7 0 ÷100

This is how we change 427cm into meters:-

There are 100 centimeters in 1 meterWhen we change from cm to m we divide by:-

Remember!When we divide by 100 we move the decimal two places to the left ( (the units move two places to the right).

H T O th hth th

4 2 7 0 ÷100

This is how we change 427cm into meters:-

There are 100 centimeters in 1 meterWhen we change from cm to m we divide by:-

Remember!When we divide by 100 we move the decimal two places to the left ( (the units move two places to the right).

H T O th hth th

4 2 7 0 ÷100

This is how we change 427cm into meters:-

Therefore:-Therefore:-

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

3 2 6

H T O t h th

3 2 6

H T O t h th

4 7 6

H T O t h th

1 6 5 3

H T O t h th

0 4 7 6

H T O 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 centimeters to metersConvert from centimeters to meters

To change from meters to centimeters To change from meters to centimeters we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 we move the When we multiply by 100 we move the decimal to the right (and each digit decimal to the right (and each digit moves two places to the left)moves two places to the left)

H T O 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.

REMEMBERREMEMBERWhen we multiply by 100 we move the decimal to the right When we multiply by 100 we move the decimal to the right (and each digit moves two places to the left)(and each digit moves two places to the left)

H T O t h th

3 5 1

3.51m = 3.51m =

To change from meters to centimeters To change from meters to centimeters we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBERWhen we multiply by 100 we move the decimal to the right When we multiply by 100 we move the decimal to the right (and each digit moves two places to the left)(and each digit moves two places to the left)

H T O t h th

3 5 1

3.51m = 3.51m =

To change from meters to centimeters To change from meters to centimeters we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBERWhen we multiply by 100 we move the decimal to the right When we multiply by 100 we move the decimal to the right (and each digit moves two places to the left)(and each digit moves two places to the left)

H T O t h th

3 5 1

3.51m = 3.51m =

To change from meters to centimeters To change from meters to centimeters we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBERWhen we multiply by 100 we move the decimal to the right When we multiply by 100 we move the decimal to the right (and each digit moves two places to the left)(and each digit moves two places to the left)

H T O t h th

3 5 1

3.51m = 3.51m =

To change from meters to centimeters To change from meters to centimeters we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBERWhen we multiply by 100 we move the decimal to the right When we multiply by 100 we move the decimal to the right (and each digit moves two places to the left)(and each digit moves two places to the left)

H T O t h th

3 5 1

3.51m = 3.51m =

To change from meters to centimeters To change from meters to centimeters we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBERWhen we multiply by 100 we move the decimal to the right When we multiply by 100 we move the decimal to the right (and each digit moves two places to the left)(and each digit moves two places to the left)

H T O t h th

3 5 1

3.51m = 3.51m =

To change from meters to centimeters To change from meters to centimeters we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBERWhen we multiply by 100 we move the decimal to the right When we multiply by 100 we move the decimal to the right (and each digit moves two places to the left)(and each digit moves two places to the left)

H T O t h th

3 5 1

3.51m = 3.51m =

To change from meters to centimeters To change from meters to centimeters we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBER: When we multiply by REMEMBER: When we multiply by 100 100 we move the we move the decimal two places decimal two places to the rightto the right ( (each digit moves two each digit moves two places to the left)places to the left)

H T 0 t h th

3 5 1

3.51m = 3.51m =

To change from meters to centimeters To change from meters to centimeters we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBERWhen we multiply by 100 we move the decimal to the right When we multiply by 100 we move the decimal to the right (and each digit moves two places to the left)(and each digit moves two places to the left)

H T O t h th

3 5 1

3.51m = 3.51m =

To change from meters to centimeters To change from meters to centimeters we MULTIPLY BY 100.we MULTIPLY BY 100.

REMEMBERREMEMBER

When we multiply by 100 When we multiply by 100 move the decimal move the decimal two places to the right (each digit moves two places to the left)two places to the right (each digit moves two places to the left)

H T O 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 meters into Try changing these measurements in meters into centimeterscentimeters