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1. 计算:
(1) $(-3)^{3} - |-7| + 3 - 2 × (-\dfrac{1}{2})$;
(2) $-2^{2} + 16 ÷ (-2)^{3} - (-1)^{99}$.
(1) $(-3)^{3} - |-7| + 3 - 2 × (-\dfrac{1}{2})$;
(2) $-2^{2} + 16 ÷ (-2)^{3} - (-1)^{99}$.
答案
(1)-30
(2)-5
(2)-5
2. 计算:
(1) $(-2)^{4} × (-\dfrac{1}{2^{3}}) - (-8)^{3} × 0.125^{2}$；
(2) $\dfrac{8}{5} ÷ (\dfrac{8}{5} - \dfrac{8}{15}) + \dfrac{1}{2} × (\dfrac{1}{2} - \dfrac{1}{4} - \dfrac{1}{8})$。
(1) $(-2)^{4} × (-\dfrac{1}{2^{3}}) - (-8)^{3} × 0.125^{2}$；
(2) $\dfrac{8}{5} ÷ (\dfrac{8}{5} - \dfrac{8}{15}) + \dfrac{1}{2} × (\dfrac{1}{2} - \dfrac{1}{4} - \dfrac{1}{8})$。
答案
(1)6
(2)$\dfrac{25}{16}$
(2)$\dfrac{25}{16}$
3. 计算:
(1) $-6^2 ÷ 2\dfrac{1}{4} × (-1\dfrac{1}{2})^2 + |-4| - (-2)^2 × (-\dfrac{1}{3})$；
(2) $(5^2 - 1) ÷ (-\dfrac{3}{15}) + 2 × (-4\dfrac{1}{3}) + (-5 × 4) ÷ (-\dfrac{15}{3})$。
答
答
(1) $-6^2 ÷ 2\dfrac{1}{4} × (-1\dfrac{1}{2})^2 + |-4| - (-2)^2 × (-\dfrac{1}{3})$；
(2) $(5^2 - 1) ÷ (-\dfrac{3}{15}) + 2 × (-4\dfrac{1}{3}) + (-5 × 4) ÷ (-\dfrac{15}{3})$。
答
答
答案
(1)$-30\dfrac{2}{3}$
(2)$-124\dfrac{2}{3}$
(2)$-124\dfrac{2}{3}$
