一、口算。
$628÷2=$
$7.2+1.88=$
$0.56÷0.8=$
$20-10.45=$
$31.2-30.08=$
$5.1÷17=$
$7.4+2.6=$
$0.15×40=$
$1.25×0.8=$
$1.44÷0.2=$
$0.08×9.5=$
$3.14×0.5=$
$\frac{8}{9}×\frac{2}{3}=$
$\frac{1}{100}÷\frac{1}{10}=$
$\frac{14}{15}÷\frac{7}{3}=$
$\frac{5}{9}÷\frac{5}{6}=$
$\frac{4}{7}+\frac{3}{4}=$
$2-\frac{1}{5}=$
$\frac{5}{4}×4.8=$
$\frac{8}{9}÷\frac{8}{9}=$
$81÷\frac{9}{5}=$
$\frac{5}{6}×1.2=$
$\frac{1}{6}×\frac{9}{5}=$
$\frac{4}{5}+\frac{1}{3}=$

1. 314
2. 9.08
3. 0.7
4. 9.55
5. 1.12
6. 0.3
7. 10
8. 6
9. 1
10. 7.2
11. 0.76
12. 1.57
13. $\frac{16}{27}$
14. $\frac{1}{10}$
15. $\frac{2}{5}$
16. $\frac{2}{3}$
17. $\frac{37}{28}$
18. $\frac{9}{5}$
19. 6
20. 1
21. 45
22. 1
23. $\frac{3}{10}$
24. $\frac{17}{15}$

二、计算下面各题，能简算的要简算。
$960×(1-\frac{1}{4}-\frac{1}{6})$
$(\frac{4}{5}+\frac{1}{4})÷\frac{7}{3}+\frac{7}{10}$
$\frac{8}{49}÷[\frac{9}{8}-(\frac{1}{8}+\frac{3}{7})]$
$6.9×2.7+6.9×7.3$
$(71.2-71.2×0.9)÷0.5$
$17.64÷4.9+5.73+1.37$

1. 560
2. $\frac{23}{20}$
3. $\frac{2}{7}$
4. 69
5. 14.24
6. 10.7