3．脱式计算
| 9.43-（1.74+1.43） | 0.74×3.25+0.74×6.75 | （$\frac{5}{6}$+$\frac{7}{12}$+$\frac{3}{8}$）÷$\frac{1}{48}$ |
| $\frac{5}{6}$÷（1-$\frac{9}{20}$）×$\frac{1}{5}$ | $\frac{3}{8}÷[{（\frac{1}{2}+\frac{1}{3}）×\frac{3}{10}}]$ | 8÷$\frac{6}{7}$÷（2-$\frac{3}{5}$） |
2．直接写得数
0 157722 157730 157736 157740 157746 157748 157752 157758 157760 157766 157772 157776 157778 157782 157788 157790 157796 157800 157802 157806 157808 157812 157814 157816 157817 157818 157820 157821 157822 157824 157826 157830 157832 157836 157838 157842 157848 157850 157856 157860 157862 157866 157872 157878 157880 157886 157890 157892 157898 157902 157908 157916 199269
| 25×40%= | 0.25×0.12= | 3.6÷25%×4= | 28.4÷0.4= |
| （12.5+$\frac{3}{4}$）×8= | 19-$5\frac{3}{5}$-1= | 8+0.1÷0.1-8= | $\frac{4}{9}$÷$\frac{4}{7}$= |
