1. $(-3)^{3}$的值为()
A. $-27$
B. $-9$
C. $9$
D. $27$
A. $-27$
B. $-9$
C. $9$
D. $27$
答案
A
2. (2024·包头改编)计算$(-1)^{2026}$的结果是()
A. $-2026$
B. $2026$
C. $-1$
D. $1$
A. $-2026$
B. $2026$
C. $-1$
D. $1$
答案
D
3. 下列计算正确的是()
A. $-1+2= 1$
B. $-1-1= 0$
C. $(-1)^{6}= -1$
D. $-1^{6}= 1$
A. $-1+2= 1$
B. $-1-1= 0$
C. $(-1)^{6}= -1$
D. $-1^{6}= 1$
答案
A
4. (1) 计算:$(-2)^{3}= $______,$(-1)^{202}= $______;
(2) $(-\frac{2}{3})^{2}$的相反数是______,倒数是______,绝对值是______.
(2) $(-\frac{2}{3})^{2}$的相反数是______,倒数是______,绝对值是______.
答案
(1) $-8$ 1 (2) $-\frac{4}{9}$ $\frac{9}{4}$ $\frac{4}{9}$
5. 计算:
(1) $(-4)^{3}$;
(2) $-0.1^{2}$;
(3) $(\frac{2}{7})^{3}$;
(4) $\frac{2^{2}}{5}$;
(5) $-(-2)^{6}$;
(6) $|-5|^{3}$.
(1) $(-4)^{3}$;
(2) $-0.1^{2}$;
(3) $(\frac{2}{7})^{3}$;
(4) $\frac{2^{2}}{5}$;
(5) $-(-2)^{6}$;
(6) $|-5|^{3}$.
答案
(1) $-64$ (2) $-0.01$ (3) $\frac{8}{343}$ (4) $\frac{4}{5}$ (5) $-64$ (6) $125$
6. 计算:
(1) $-(-7)^{2}×(-1^{8})$;
(2) $-\frac{3^{3}}{2}÷(-5)^{2}$;
(3) $(\frac{3}{5})^{3}×(-1\frac{2}{3})^{4}$;
(4) $(-\frac{1}{4})^{3}×(-4^{2})÷(-1)^{11}$.
(1) $-(-7)^{2}×(-1^{8})$;
(2) $-\frac{3^{3}}{2}÷(-5)^{2}$;
(3) $(\frac{3}{5})^{3}×(-1\frac{2}{3})^{4}$;
(4) $(-\frac{1}{4})^{3}×(-4^{2})÷(-1)^{11}$.
答案
(1) $49$ (2) $-\frac{27}{50}$ (3) $\frac{5}{3}$ (4) $-\frac{1}{4}$
