一、口算。
$127 + 721 =$
$1.76 ÷ 0.08 =$
$7 × 0.09 ÷ 0.3 =$
$5.5 - 3.14 =$
$19 ÷ 100 =$
$4 × 0.9 × 0.25 =$
$3.89 + 9.11 =$
$5.5 - 2.9 =$
$2.6 × 0.5 - 1.3 =$
$7.8 ÷ 26 =$
$0.35 × 100 =$
$3.3 × 3 ÷ 3.3 × 3 =$
$\frac{1}{8} × \frac{2}{5} =$
$\frac{3}{2} - \frac{4}{3} =$
$20 × \frac{3}{4} + 20 =$
$\frac{6}{7} ÷ \frac{4}{7} =$
$\frac{5}{3} × \frac{8}{3} =$
$\frac{3}{8} ÷ \frac{3}{10} × \frac{1}{3} =$
$\frac{2}{3} - \frac{4}{9} =$
$\frac{8}{9} + \frac{1}{3} =$
$121 × \frac{7}{11} - 70 =$
$\frac{4}{3} × 0.45 =$
$\frac{1}{25} ÷ \frac{1}{10} =$
$( \frac{7}{16} - \frac{1}{4} ) × 8 =$

1. 127 + 721 = 848
2. 1.76 ÷ 0.08 = 22
3. 7 × 0.09 ÷ 0.3 = 2.1
4. 5.5 - 3.14 = 2.36
5. 19 ÷ 100 = 0.19
6. 4 × 0.9 × 0.25 = 0.9
7. 3.89 + 9.11 = 13
8. 5.5 - 2.9 = 2.6
9. 2.6 × 0.5 - 1.3 = 0
10. 7.8 ÷ 26 = 0.3
11. 0.35 × 100 = 35
12. 3.3 × 3 ÷ 3.3 × 3 = 9
13. $\frac{1}{8} × \frac{2}{5} = \frac{1}{20}$
14. $\frac{3}{2} - \frac{4}{3} = \frac{1}{6}$
15. $20 × \frac{3}{4} + 20 = 35$
16. $\frac{6}{7} ÷ \frac{4}{7} = \frac{3}{2}$
17. $\frac{5}{3} × \frac{8}{3} = \frac{40}{9}$
18. $\frac{3}{8} ÷ \frac{3}{10} × \frac{1}{3} = \frac{5}{12}$
19. $\frac{2}{3} - \frac{4}{9} = \frac{2}{9}$
20. $\frac{8}{9} + \frac{1}{3} = \frac{11}{9}$
21. $121 × \frac{7}{11} - 70 = 7$
22. $\frac{4}{3} × 0.45 = \frac{3}{5}$
23. $\frac{1}{25} ÷ \frac{1}{10} = \frac{2}{5}$
24. $( \frac{7}{16} - \frac{1}{4} ) × 8 = \frac{3}{2}$

二、计算下面各题，能简算的要简算。
$32×\frac{33}{34}÷\frac{32}{33}$
$\frac{2}{7}÷[\frac{5}{6}×(\frac{4}{5}-\frac{2}{3})]$
$\frac{8}{25}÷7+\frac{1}{7}×\frac{6}{25}$
$(9.6 - 1.6÷8)×1.2$
$4.25÷2.5×101 - 1.7$
$[(2 - 0.8)÷0.8]×4.5$

1. $32×\frac{33}{34}÷\frac{32}{33} = 32\frac{1}{34}$
2. $\frac{2}{7}÷[\frac{5}{6}×(\frac{4}{5}-\frac{2}{3})] = \frac{18}{7}$
3. $\frac{8}{25}÷7+\frac{1}{7}×\frac{6}{25} = \frac{2}{25}$
4. $(9.6 - 1.6÷8)×1.2 = 11.28$
5. $4.25÷2.5×101 - 1.7 = 170$
6. $[(2 - 0.8)÷0.8]×4.5 = 6.75$