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1. 计算:
(1) $3+(-\dfrac{1}{2})-2÷(-\dfrac{4}{3})$;
(2) $(-0.25)×8×(-4)×(-0.125)$;
(3) $(-28)÷(-8+4)+(-1)×7$;
(4) $72×(\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{4}-\dfrac{1}{12})$;
(5) $0-2^3÷(-4)^3-\dfrac{1}{8}$;
(6) $-2^3÷8-\dfrac{1}{4}×(-2)^2$.
(1) $3+(-\dfrac{1}{2})-2÷(-\dfrac{4}{3})$;
(2) $(-0.25)×8×(-4)×(-0.125)$;
(3) $(-28)÷(-8+4)+(-1)×7$;
(4) $72×(\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{4}-\dfrac{1}{12})$;
(5) $0-2^3÷(-4)^3-\dfrac{1}{8}$;
(6) $-2^3÷8-\dfrac{1}{4}×(-2)^2$.
答案
(1)4 (2)-1 (3)0 (4)24 (5)0 (6)-2
2. 计算:
(1) $(-4)^2 × (-\dfrac{3}{4}) + 30 ÷ (-6)$;
(2) $\left|-\dfrac{1}{2}\right| × (-6) + (-\dfrac{2}{3}) × 3^2$;
(3) $-2^5 × 0.5 - (-1.6)^2 ÷ (-2)^2$;
(4) $|3 - 5| + 50 ÷ 2^2 × (-\dfrac{1}{5}) - 1$.
(1) $(-4)^2 × (-\dfrac{3}{4}) + 30 ÷ (-6)$;
(2) $\left|-\dfrac{1}{2}\right| × (-6) + (-\dfrac{2}{3}) × 3^2$;
(3) $-2^5 × 0.5 - (-1.6)^2 ÷ (-2)^2$;
(4) $|3 - 5| + 50 ÷ 2^2 × (-\dfrac{1}{5}) - 1$.
答案
(1)-17 (2)-9 (3)$-16\dfrac{16}{25}$ (4)$-\dfrac{3}{2}$
