a) $\sqrt{0.04}+\sqrt{0.25}+2.31 = 0.2+0.5+2.31=3.01$
b) $(-\sqrt{0.09})+(-\sqrt{169})+12.501= -0.3-13+12.501=-0.799$
c)$\frac{\sqrt{49}}{\sqrt{4}}+\frac{\sqrt{225}}{\sqrt{144}}-3.5= \frac{7}{2}+\frac{15}{12}=4.75$
d)$(-\sqrt{0.04})\times\sqrt{0.01}+12.02= -0.02+12.02=12$
e) $\left | \frac{-11}{3} \right |+(\frac{-1}{2})^{2}-\left |4\frac{1}{2}+(-3.25) \right |= \frac{11}{3}+\frac{1}{4}-\frac{5}{4}=\frac{8}{3}$
g) $\left | \sqrt{169}-\sqrt{900}\right |-\left | \frac{-5}{4} \right |/(\frac{1}{3}-\frac{1}{2})^{2}= 17-\frac{5}{4}/\frac{1}{36}=-28$