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一、填空题
1. $-5+7-8+1+17=$
2. $318-139-518=$
3. $-5.3+1.6+2.3-3.6=$
4. $(-138)+(-15\dfrac{8}{11})+138=$
5. $-8×(-9)×(-1.125)=$
6. $-15\dfrac{1}{10}+\dfrac{1}{11}=$
7. $(\dfrac{3}{5}-\dfrac{8}{9}-1)×45=$
8. $\dfrac{7}{15}×(-12)+(-\dfrac{8}{15})×12=$
1. $-5+7-8+1+17=$
12
2. $318-139-518=$
-339
3. $-5.3+1.6+2.3-3.6=$
-5
4. $(-138)+(-15\dfrac{8}{11})+138=$
$-15\dfrac{8}{11}$
5. $-8×(-9)×(-1.125)=$
-81
6. $-15\dfrac{1}{10}+\dfrac{1}{11}=$
$-15\dfrac{1}{110}$
7. $(\dfrac{3}{5}-\dfrac{8}{9}-1)×45=$
-58
8. $\dfrac{7}{15}×(-12)+(-\dfrac{8}{15})×12=$
-12
答案
1. 12
2. -339
3. -5
4. $-15\dfrac{8}{11}$
5. -81
6. $-15\dfrac{1}{110}$
7. -58
8. -12
2. -339
3. -5
4. $-15\dfrac{8}{11}$
5. -81
6. $-15\dfrac{1}{110}$
7. -58
8. -12
二、计算题
9. $0.25÷(-3\ \frac{2}{13})÷(+\frac{1}{4})$
10. $-2.17+(-2\ \frac{5}{9})-(+7.83)+(-1\ \frac{4}{9})$
11. $-567\ \frac{1}{7}+566\ \frac{1}{8}$
12. $-999\ \frac{1}{6}×6$
13. $(\frac{5}{9}-\frac{1}{12}+\frac{7}{6})÷(-\frac{1}{72})$
14. $(-3)×(-\frac{1}{4})+0.25×24.5+(-3\ \frac{1}{2})×25\%$
15. $15×998+36×(\frac{3}{4}+\frac{5}{6}-\frac{8}{9})-(-15)×(-999)+9×(-15)$
9. $0.25÷(-3\ \frac{2}{13})÷(+\frac{1}{4})$
10. $-2.17+(-2\ \frac{5}{9})-(+7.83)+(-1\ \frac{4}{9})$
11. $-567\ \frac{1}{7}+566\ \frac{1}{8}$
12. $-999\ \frac{1}{6}×6$
13. $(\frac{5}{9}-\frac{1}{12}+\frac{7}{6})÷(-\frac{1}{72})$
14. $(-3)×(-\frac{1}{4})+0.25×24.5+(-3\ \frac{1}{2})×25\%$
15. $15×998+36×(\frac{3}{4}+\frac{5}{6}-\frac{8}{9})-(-15)×(-999)+9×(-15)$
答案
9. $-\dfrac{13}{41}$
10. -14
11. $-1\dfrac{1}{56}$
12. -5 995
13. -118
14. 6
15. -125
10. -14
11. $-1\dfrac{1}{56}$
12. -5 995
13. -118
14. 6
15. -125
