(1) 下列各对数中，数值相等的是()

A.$-2^7$与$(-2)^7$
B.$-3^2$与$(-3)^2$
C.$-3×2^3$与$-3^2×2$
D.$-(-3)^2$与$-(-2)^3$

(1)A

(2) 下列各组数中，互为相反数的是()

A.$-(-1)$与1
B.$(-1)^2$与1
C.$|-1|$与1
D.$-1^2$与1

(2)D

(3) 下列各组式中，不相等的是()

A.$(-3)^2$和$-3^2$
B.$(-3)^2$和$3^2$
C.$(-2)^3$和$-2^3$
D.$|-2|^3$和$|-2^3|$

(3)A

3. 填空：
(1) $(-\dfrac{1}{2})^3 = $ ;
(2) $-(-3)^2 = $ ;
(3) $(-\dfrac{1}{3})^2 = $ ;
(4) $-3^2 = $ ;
(5) $(-1)^{2020} - (-1)^{2019} = $ ;
(6) $4× (-2)^3 = $ ;
(7) $2÷ \dfrac{1}{3} × 3 = $ ;
(8) $(-3)^2 - (-2)^3 = $ .

3.(1)$-\dfrac{1}{8}$ (2)-9 (3)$\dfrac{1}{9}$ (4)-9 (5)2 (6)-32 (7)18 (8)17

4. 计算:
(1) $2^4 × 5^4$;
(2) $2^3 - 2^2$;
(3) $(-48) ÷ (-2)^3 - (-25) × (-4) + (-2)^2$;
(4) $(-3)^2 + |-1| + (-\frac{1}{2})$;
(5) $(-\frac{1}{2})^2 + (-1)^{2019}$;
(6) $-32 + [9 - (-6) × 2] ÷ (-3)$;
(7) $-1^{2019} - (-2)^3 + |1 - (-3)^2|$;
(8) $-4^2 × \left| \frac{1}{2} -1 \right| × (-5) +2$;
(9) $(-1)^{2020} × (-5) + (-1)$;
(10) $-2^2 +12 ÷ ( \frac{1}{3} + \frac{1}{4} - \frac{1}{2} )$;
(11) $(-1)^3 - \frac{1}{4} × [2 - (-3)^2]$;
(12) $-1^2 + (-2) ÷ (-\frac{1}{3}) + |-9|$;
(13) $-\frac{3}{4} × [ -3^2 × (-\frac{2}{3})^3 -2 ]$;
(14) $(-2)^4 ÷ (-2\frac{2}{3})^2 +5\frac{1}{2} × (-\frac{1}{6}) -0.25$.

4.(1)10 000 (2)4 (3)-90 (4)$\dfrac{19}{2}$ (5)$-\dfrac{3}{4}$ (6)-39 (7)15 (8)42 (9)-6 (10)140 (11)$\dfrac{3}{4}$ (12)14 (13)$-\dfrac{1}{2}$ (14)$1\dfrac{1}{12}$