一、口算。
$4÷0.25=$
$8.8÷0.11=$
$12.5×8=$
$3.2÷0.04=$
$1.2×0.8=$
$4.08+5.2=$
$1.8×40=$
$3.2×0.5=$
$1.9+4.01=$
$7÷0.35=$
$3.6-0.36=$
$4.2×3=$
$\frac{5}{8} - 0.2 =$
$35 ÷ \frac{5}{7} =$
$85 - 85 × \frac{2}{5} =$
$\frac{8}{9} × \frac{6}{11} =$
$2.5 × \frac{4}{5} =$
$36 × (1 + \frac{1}{9}) =$
$5 - \frac{1}{4} =$
$100 ÷ \frac{2}{3} =$
$120 × (1 + \frac{3}{8}) =$
$0.4 ÷ \frac{8}{9} =$
$0.6 + \frac{3}{7} =$
$0.8 + 0.8 × \frac{4}{5} =$

1. 16
2. 80
3. 100
4. 80
5. 0.96
6. 9.28
7. 72
8. 1.6
9. 5.91
10. 20
11. 3.24
12. 12.6
13. $\frac{17}{40}$
14. 49
15. 51
16. $\frac{16}{33}$
17. 2
18. 40
19. $4\frac{3}{4}$
20. 150
21. 165
22. $\frac{9}{20}$
23. $\frac{36}{35}$
24. $\frac{36}{25}$

二、计算下面各题，能简算的要简算。
0.25÷$\frac{11}{6}$÷$\frac{1}{4}$
$( \frac{1}{6} + \frac{5}{8} ÷ \frac{3}{4} ) ÷ \frac{8}{5}$
$\frac{1}{7} × \frac{9}{16} + \frac{5}{16} ÷ 7$
9.2×3.6÷15
7.8×1.17 -7.8×0.17
4.9÷[2.6 - (2.78 - 0.88)]

1. $\frac{6}{11}$
2. $\frac{5}{8}$
3. $\frac{1}{8}$
4. 2.208
5. 7.8
6. 7