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一、填空题
1. $(-6)^3 =$
2. $-(-5^3) =$
3. $-2\frac{1}{4} ÷ (-\frac{2}{3})^2 =$
4. $(-\frac{2}{3})^3 × (-3)^2 =$
1. $(-6)^3 =$
-216
2. $-(-5^3) =$
125
3. $-2\frac{1}{4} ÷ (-\frac{2}{3})^2 =$
$-\dfrac{81}{16}$
4. $(-\frac{2}{3})^3 × (-3)^2 =$
$-\dfrac{8}{3}$
答案
1. -216
2. 125
3. $-\dfrac{81}{16}$
4. $-\dfrac{8}{3}$
2. 125
3. $-\dfrac{81}{16}$
4. $-\dfrac{8}{3}$
5. $-1 \dfrac{1}{5} - (-4 \dfrac{2}{7}) ÷ (-5)^2 =$
6. $4 \dfrac{1}{7} × (-7^2) - (+2 \dfrac{1}{7}) =$
$-1 \dfrac{1}{35}$
6. $4 \dfrac{1}{7} × (-7^2) - (+2 \dfrac{1}{7}) =$
$-205 \dfrac{1}{7}$
答案
5. $-1 \dfrac{1}{35}$
6. $-205 \dfrac{1}{7}$
6. $-205 \dfrac{1}{7}$
7. 我国幅员辽阔，陆地面积约为960万平方千米，将960万用科学记数法表示为
$9.6×10^6$
.答案
7. $9.6×10^6$
二、计算题
8. $15 - 27 ÷ (-9^2)$
9. $(-6)^2 × (-1\dfrac{1}{2})^2 × (\dfrac{2}{3})^3$
10. $(-\dfrac{1}{3})^3 × (3^4 - 30) + \dfrac{2}{3^2}$
11. $-\dfrac{5}{6} ÷ (-\dfrac{5}{4})^3 × \dfrac{3}{2} - (-1\dfrac{1}{5})^2$
12. $-6^2 ÷ 2\dfrac{1}{4} × \dfrac{4}{9} ÷ (-4)^3$
13. $5 × (-1^{200}) - (-7^3) × (-\dfrac{1}{7})$
14. $(-1.5)^3 × 8 - (-1.6)^2 ÷ (-2^4)$
15. $2^3 - (-\dfrac{1}{2})^4 × 5 + (-\dfrac{1^4}{2}) × (-1^{10})$
8. $15 - 27 ÷ (-9^2)$
9. $(-6)^2 × (-1\dfrac{1}{2})^2 × (\dfrac{2}{3})^3$
10. $(-\dfrac{1}{3})^3 × (3^4 - 30) + \dfrac{2}{3^2}$
11. $-\dfrac{5}{6} ÷ (-\dfrac{5}{4})^3 × \dfrac{3}{2} - (-1\dfrac{1}{5})^2$
12. $-6^2 ÷ 2\dfrac{1}{4} × \dfrac{4}{9} ÷ (-4)^3$
13. $5 × (-1^{200}) - (-7^3) × (-\dfrac{1}{7})$
14. $(-1.5)^3 × 8 - (-1.6)^2 ÷ (-2^4)$
15. $2^3 - (-\dfrac{1}{2})^4 × 5 + (-\dfrac{1^4}{2}) × (-1^{10})$
答案
8. $15\dfrac{1}{3}$
9. 24
10. $-\dfrac{5}{3}$
11. $-\dfrac{4}{5}$
12. $\dfrac{1}{9}$
13. -54
14. $-26\dfrac{21}{25}$
15. $8\dfrac{3}{16}$
9. 24
10. $-\dfrac{5}{3}$
11. $-\dfrac{4}{5}$
12. $\dfrac{1}{9}$
13. -54
14. $-26\dfrac{21}{25}$
15. $8\dfrac{3}{16}$
