(a) 2 mm

Here,

We have to convert the given quantity into cm

Now,

We know that,

1cm = 10mm

Hence,

We can convert the given quantity into cm as follows:

2mm =

= 0.2 cm

(b) 30 mm

Here,

We have to convert the given quantity into cm

Now,

We know that,

1cm = 10mm

Hence,

We can convert the given quantity into cm as follows:

30mm =

= 3.0 cm

(c) 116 mm

Here,

We have to convert the given quantity into cm

Now,

We know that,

1cm = 10mm

Hence,

We can convert the given quantity into cm as follows:

116mm =

= 11.6 cm

(d) 4 cm 2 mm

Here,

We have to convert the given quantity into cm

Now,

We know that,

1cm = 10mm

Hence,

We can convert the given quantity into cm as follows:

4cm 2mm =

= 4.2 cm

(e) 162 mm

Here,

We have to convert the given quantity into cm

Now,

We know that,

1cm = 10mm

Hence,

We can convert the given quantity into cm as follows:

162mm =

= 16.2 cm

(f) 83 mm

Here,

We have to convert the given quantity into cm

Now,

We know that,

1cm = 10mm

Hence,

We can convert the given quantity into cm as follows:

83mm =

= 8.3 cm