登录
6.(1) $-1^4 - \frac{1}{6} × [2 - (-3)^2]$
(2) $(-3)^2 × [\frac{2}{3} + (-\frac{4}{9})]$
(2) $(-3)^2 × [\frac{2}{3} + (-\frac{4}{9})]$
答案
6. (1) $\frac{1}{6}$ (2) 2
7.(1)$(\frac{1}{2}-\frac{1}{3})÷(-\frac{1}{6})+(-2)^2×7.$
(2)$(-1)^3×(-3)^2-(-2)^3÷(-1).$
(2)$(-1)^3×(-3)^2-(-2)^3÷(-1).$
答案
(1) 27 (2) $-17$
8.(1) $81 ÷ (-\frac{9}{4}) × \frac{4}{9} ÷ (-32)$
(2) $99\frac{18}{19} × (-19)$
9. $-|-2|^2 + (-2)^4 ÷ [2 + (-2)^3]$
10. $[ (-2)^2 - (-1\frac{1}{2})^2 ] ÷ \left| \frac{5}{6} - \frac{1}{4} \right|$
11. $1\frac{1}{2} + (-\frac{5}{7}) × 2\frac{1}{2} - (-\frac{1}{2}) ÷ 1\frac{2}{5}$
12. $(-4^2) ÷ ( \frac{2}{3} )^2 + 3\frac{1}{2} × (-\frac{1}{2})$
(2) $99\frac{18}{19} × (-19)$
9. $-|-2|^2 + (-2)^4 ÷ [2 + (-2)^3]$
10. $[ (-2)^2 - (-1\frac{1}{2})^2 ] ÷ \left| \frac{5}{6} - \frac{1}{4} \right|$
11. $1\frac{1}{2} + (-\frac{5}{7}) × 2\frac{1}{2} - (-\frac{1}{2}) ÷ 1\frac{2}{5}$
12. $(-4^2) ÷ ( \frac{2}{3} )^2 + 3\frac{1}{2} × (-\frac{1}{2})$
答案
8. (1) $\frac{1}{2}$ (2) $-1899$
9. $-6\frac{2}{3}$
10. 3
11. $\frac{1}{14}$
12. $-37\frac{3}{4}$
9. $-6\frac{2}{3}$
10. 3
11. $\frac{1}{14}$
12. $-37\frac{3}{4}$
