(i) $$2.56$$, place value of $$2=2 \times 1=2$$
(ii) $$21.37$$, place value of $$2= 2\times 10=20$$
(iii) $$10.25$$, place value of $$2=2 \times \dfrac{1}{10}=\dfrac{2}{1}$$
(iv) $$63.352$$, place value of $$2= 2 \times \dfrac{1}{1000}= \dfrac{2}{1000}$$