1. 计算:
(1) $3 - 7 ÷ (5 - 2\dfrac{2}{3})$;
(2) $4 × (-\dfrac{1}{4})^2 - (-2)^3 ÷ 8$;
(3) $-3 × (-4) + (-28) ÷ 7 + 2^2$;
(4) $\left| -\dfrac{4}{5} \right| ÷ 0.4 + 3.6 × 1\dfrac{1}{2}$;
(5) $\dfrac{3}{8} × [ \dfrac{8}{9} ÷ ( \dfrac{5}{6} - \dfrac{3}{4} ) ]$;
(6) $(-2) × 8 - 8 × ( \dfrac{1}{2} )^3 + 8 ÷ \dfrac{1}{8}$.

(1)0 (2)$\dfrac{5}{4}$ (3)12 (4)7.4 (5)4 (6)47

2. 计算:
(1) $[\dfrac{3}{5} - (\dfrac{2}{3} - \dfrac{1}{4}) ÷ \dfrac{5}{6}] ÷ \dfrac{1}{10}$;
(2) $(-3)^2 ÷ 2\dfrac{1}{4} - (-\dfrac{4}{3}) × (-\dfrac{3}{8})$;
(3) $(-1)^{99} - 6 ÷ (-2) × \left|-\dfrac{1}{3}\right|$;
(4) $-2^2 - (-5 + 3) + 27 ÷ (-3) × \dfrac{1}{3}$.

(1)1 (2)$\dfrac{7}{2}$ (3)0 (4)-5