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| style="height:20px; width:200px; text-align:center;" |''Convert to [[millimetre]]s x10.''
| style="height:20px; width:200px; text-align:center;" |''10mm''
|}
==Key Stage 4==
===Meaning===
'''Millimetres''' ('''mm''') are a [[unit]] of [[distance]], [[displacement]] and [[wavelength]] 1,000 times smaller than the [[SI Unit]]; the [[Metre]].
===About Millimetres===
: '''Millimetres''' are shortened to '''mm''' with a lower case m and another lower case m.
: [[Milli]] means one thousandth so there are 1,000 [[millimetre]]s in a [[Metre]].
===Converting to Millimetres===
{| class="wikitable"
|-
| style="height:20px; width:200px; text-align:center;" |'''Unit'''
| style="height:20px; width:200px; text-align:center;" |'''To convert'''
| style="height:20px; width:200px; text-align:center;" |'''Millimetres'''
|-
| style="height:20px; width:200px; text-align:center;" |1 [[megametre]] (1Mm)
| style="height:20px; width:200px; text-align:center;" |Convert to '''millimetres''' x10<sup>9</sup>
| style="height:20px; width:200px; text-align:center;" |1x10<sup>9</sup>mm
|-
| style="height:20px; width:200px; text-align:center;" |1 [[kilometre]] (1km)
| style="height:20px; width:200px; text-align:center;" |Convert to '''millimetres''' x10<sup>6</sup>
| style="height:20px; width:200px; text-align:center;" |1x10<sup>6</sup>mm
|-
| style="height:20px; width:200px; text-align:center;" |1 [[Metre]] (1m)
| style="height:20px; width:200px; text-align:center;" |Convert to '''millimetres''' x10<sup>3</sup>
| style="height:20px; width:200px; text-align:center;" |1x10<sup>3</sup>mm
|-
| style="height:20px; width:200px; text-align:center;" |1 [[decimetre]] 1(dm)
| style="height:20px; width:200px; text-align:center;" |Convert to '''Metres''' x10<sup>2</sup>
| style="height:20px; width:200px; text-align:center;" |1x10<sup>-7</sup>m
|-
| style="height:20px; width:200px; text-align:center;" |1 [[centimetre]] 1(mm)
| style="height:20px; width:200px; text-align:center;" |Convert to '''Metres''' x10<sup>1</sup>
| style="height:20px; width:200px; text-align:center;" |1x10<sup>-8</sup>m
|-
| style="height:20px; width:200px; text-align:center;" |1 [[millimetre]] 1(mm)
| style="height:20px; width:200px; text-align:center;" |Convert to '''millimetres''' x1
| style="height:20px; width:200px; text-align:center;" |1mm
|-
| style="height:20px; width:200px; text-align:center;" |1 [[micrometre]] 1(µm)
| style="height:20px; width:200px; text-align:center;" |Convert to '''millimetres''' x10<sup>-3</sup>
| style="height:20px; width:200px; text-align:center;" |1x10<sup>-3</sup>mm
|-
| style="height:20px; width:200px; text-align:center;" |1 [[nanometre]] 1(nm)
| style="height:20px; width:200px; text-align:center;" |Convert to '''millimetres''' x10<sup>-6</sup>
| style="height:20px; width:200px; text-align:center;" |1x10<sup>-6</sup>mm
|}