1. 计算:
(1)$18 - 2 + (-2)×3$;
(2)$-35÷(-7)×(-\dfrac{1}{7})$;
(3)$-4 + (-\dfrac{1}{3})×6 - (-3)$;
(4)$(-3)×(-\dfrac{1}{2}) - (-3)÷(-6)$;
(5)$-2^3÷\dfrac{4}{9}×(-\dfrac{2}{3})^2$;
(6)$(-\dfrac{1}{2})^2×(-4)÷(-2)^2$.

(1)10
(2)$-\dfrac{5}{7}$
(3)-3
(4)1
(5)-8
(6)$-\dfrac{1}{4}$

2. 计算:
(1) $-5^{2} ÷ \dfrac{1}{5} × 5 - (-10)^{2}$;
(2) $4^{2} + 6 ÷ (-2) × \left| -\dfrac{1}{3} \right|$;
(3) $-\left| -5 \right| + (-3)^{3} ÷ (-1^{2})$;
(4) $0.75 × 5 + 4 × 5.5 + \dfrac{1}{4} × 5 - 4 × 7.5$.

(1)-725
(2)15
(3)22
(4)-3