Question

How many millimeters are in 50 cm?

Answer 1

`500" millimetres"`

Explanation:

To convert from centimetres ( cm) to millimetres (mm) use the following conversion.

`color(red)(bar(ul(|color(white)(2/2)color(black)(1"cm"=10"mm")color(white)(2/2)|)))larr" worth remembering"`

`1"cm"to10"mm"`

`rArr50"cm"to50xx10"mm"=500"mm"`

Answer 2

50 cm is the same length as 500 mm

Explanation:

The same as Jim but using a ratio format in that of a fraction

Known: 1 cm = 10 mm

So instead of writing this like 1cm:10mm I write `(10mm)/(1cm)`

If we change the 1 cm into 50cm and maintain the ratio we have our answer.

Multiply by 1 and you do not change the value. However, 1 comes in many forms.

`color(green)((mm)/(cm) ->[10/1 color(magenta)(xx1)]" " -=" "[10/1color(magenta)(xx50/50)]`

The `-=` means equivalent to

So we now have `(mm)/(cm) -> 500/50`

So 50 cm is the same as 500 mm