Fill in the blanks
 $ 22mm = \_\_\_\_\_\_\_cm\_\_\_\_\_\_mm $

Hint: To find required answer we use millimetre to centimetre conversion formula which is given as $ 1mm = \dfrac{1}{{10}}cm $
we know that $ 1mm = \dfrac{1}{{10}}cm $ , this we will use to find 22mm in terms of centimeter.

Complete step-by-step answer:
In the statement it is given $ 22\,mm $ and we have to convert $ 22\,mm $ into cm and mm.
For this we used relation between mm and cm
As, we know that $ 1\,mm $ is one tenth part of cm.
Therefore, we can say $ 1mm = \dfrac{1}{{10}}cm $
Now, using the above relation we convert $ 22\,mm $ to cm.
From above we have
 $ 1mm = \dfrac{1}{{10}}cm $
 $
   \Rightarrow 22\,m = 22 \times \dfrac{1}{{10}} \\
   \Rightarrow 22\,m = 2.2cm \\
  or\,\,we\,\,\,can\,\,\,write\,\,\,as \\
  22\,mm = 2cm + 0.2cm \\
  or \\
  22\,mm = 2cm + 2mm \\
   \Rightarrow 22\,mm = 2cm\,\,2mm \\
  $
Hence, from above we see that the required answer is $ 2\,cm\,\,and\,\,2\,mm $ .

Note: While doing conversion in units students must be careful regarding whether they are converting small to big units or big to small units. As we know that going for big to small we use multiples of tens and for converting small to big we use multiples of one tenths.