Calculate the answers to the appropriate number of significant figures.

a$.45\mathrm{.}2+10+3\mathrm{.}3$

d$.33\mathrm{.}2-11\mathrm{.}6-5$

b$.10\mathrm{.}33+15\mathrm{.}68+78\mathrm{.}11$

e$.250\mathrm{.}00-222\mathrm{.}000-12\mathrm{.}0$

c$.2\mathrm{.}33+7+1\mathrm{.}00$

f$.658-45\mathrm{.}1-13$